I'm pretty sure it's D because it makes sense lol did that even make sense?
The first step was to plan out how and when you wanted to study. Then, you had to physically get together and talk about the topic you were studying, like by taking notes and reading articles. Then you needed to assess all of your group's notes and study them, too. Then, when the test or quiz came, you would be more prepared whereas if you didn't study at all.
It would be: 2 + 1 = 3
In short, Your Answer would be 3
Hope this helps!