Answer:
C
Step-by-step explanation:
A is too complicated and might not help your classmate understand as much
B is too hard to execute, it is a gurantee that he/she will get bored and understand less than A and C
C helps the classmate understand it better as it is not as complicated or wordy as a concise organized notes. While being able to learn more than B
C helps the audience understand and it summarizes it in a way that it could fulfill the purpose of helping the classmate/audience with the test.