A complex-compound sentence is used in this excerpt.
I believe the correct answers are 4 and 5.
Understanding the basics of a subject and taking notes in class are components of passive learning - that is, listening to someone, learning what we have heard, and trying to reproduce it. Understanding how to get good grades is not even a component of learning. The 4) and 5) options are the only ways to get really involved in the learning process, trying to apply what was learned, or trying to broaden up one's knowledge on a subject.
The sentence which is written in passive voice is option C, The entire box of books was lost in the cross-country move. In this sentence, the object "The entire box of books", the subject (who performed the action?) is not stated.
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We can re-write the sentence in active voice as: "We lost t</span><span>he entire box of books in the cross-country move". In this sentence, </span><span>the subject, "WE", performs the action "LOST"</span>
