Answer:
D. never ends with -ed
Explanation:
It is because the ed-ending words are only used for past tense words.
Hopes it helps u
It is A. because THE usually refers to one object. In this case you have more then 1 object.
Also you can see which one would you say to someone, which one is more commonly used.
You should say tests and quizzes.
1. It helps you to run through and correct any mistakes so when you give the speech it runs more smoothly.
2. it also helps to boost your confidence when you practice.