I would go ahead with D but I am sorry if I am wrong. Please let me know if I am wrong
Answer:
Using My context clues Vast means a Greatly extent or quality
Explanation:
So what you would need to do is go through your Text ( Book or whatever) and find a sentence meaning "very great extent or quantity" and then use that to form your sentense on how you figured it out USE context CLUESSS
Answer:
<h3>2.their </h3>
Explanation:
I chose "their" because we don't know if the student is a girl or a boy.Also because their a person not a thing.