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.
