Answer:
It would be SUBJECTIVE. I tried objective from other peoples answers and they were WRONG!!
1. He agreed to abdicate and retire in favor of the next in line for the throne
2. My sister always treated me like I was a blight on the family name.
3. He was blithe about the risks to his health.
4. He led an ephemeral electronic existence.
5. Their fervid attacks on image worship led
to their expulsion.
6. I refuse to use the fetid public bathroom
that looks and smells as though it has not been cleaned in months.
7. A small Colombian flag was neatly tucked in his open mouth.
8. He had much taste and love for music, and considerable gifts as an orator of a florid type.
9. She picked the flower up and poked it over her left ear.
10. People who are nice and gullible are always taken advantage of.
11. irascible doctor who is offended by his presence beats him to within an inch of his life.
12. He feared the ignominy of being exposed as a spy.
13. She kept on lamenting and crying, continued the woman.
14. He shows a monastic dedication to his job.
15. The shares were sold for well below their nominal value.
16. Because she is a chef, she notices every nuance of flavor in the meal.
17. The beginnings of his doctrine of cellular pathology date from the earliest period in his career.
18. It is a defence against sedition and socialism.
19. This argument is rather specious than sound.
20. They were once looked down upon as the tawdry poor relations of the fashion industry.
The shortened form of a word that has an apostrophe in place of a missing letter is called A contraction
An adjective clause is basically a phrase (to be exact, a dependent clause: a group of words that can't be a sentence) that provides more description. It begins with a pronoun or adverb, like: who, whom, that, which, when, where, or why. It is not necessary to the sentence, so you can take it out and it still makes sense.
Let's work backwards. D is "If I put on headphones, I can play the electric piano without disturbing others." "If I put on headphones" is a phrase, a dependent clause, providing more description. Does it start with one of the words above? No. Is it necessary to the sentence? Yes, because this is the whole point of the sentence: to tell you HOW the character can play the piano without disturbing others, using headphones. D is incorrect.
Here's C: "I have taken piano lessons since I was six years old." "Since I was six years old" provides more description and is dependent. Does it start with one of the words above? No. Is it necessary to the sentence? Yes, because again, it's the point of the sentence. "I have taken piano lessons" doesn't tell you much! C is incorrect.
What about B? "When I first learn a difficult piece, I play it very slowly." "When I first learn a difficult piece" provides more description, and is a dependent clause. Does it start with one of the words above? YES: it starts with "when"!! We're getting closer. But is it necessary to the sentence? Try it: "I play it very slowly." But WHY does the character play it slowly? This phrase IS necessary, to explain, because it's the point of the sentence! B is incorrect.
That just leaves A: "My new electric piano, which includes over 1,000 different settings, is fun to play." The dependent clause providing more description is "which includes over 1,000 different settings." Does it start with one of the words above? YES, it starts with "which"!! Is it necessary to the sentence? Try it without the clause. "My new electric piano is fun to play." That works!! The clause is NOT necessary, starts with "which," AND provides more description! We have our winner!
Answer: A
