4, I guess, if the question is asking the most efficient way for them to study, but also if it's asking for a clear sentence. :) If this is not what you're looking for, explain to me what you need help with. I'll be glad to.
Answer:
most likely ol. are doesn't really go with anything in science and ose is more with food like lactose.
The correct answer is C.
Hope this helps.
It's B. Summaries restate the main ideas of a passage in your own words, Quotations are copied word from word.
False you have to site the exact words.