I think the answer would be adds because it is present tense
The answer is D
(the verb is first rather than within the sentence)
I would oppose it. Studies show teens biological clocks naturally want to go to bed later and wake up earlier. By making school and hour earlier this makes teens more groggy especially because their bodies do not want to go to sleep earlier so this can cause sleep deprivation which will make school work less concentrated and makes teens attitudes about school worsen.
Answer: A.
Explanation:
The author was disappointed when he/she learned that only adults are able to participate (a rule) in the art contest.
"the book that I liked best" is the complete subject clause because it replaces the subject (the proof is that it agrees with the verb was). The adjectival clause is then "the one about the big fish" because it describes the subject in more detail (which is always the function of the adjective).