What Should You Do If You Have Questions About the Material

What should you do if you have questions about the material being presented during a lecture but are unable to ask those questions during class?

A) Try to memorize your questions so you can look them up in the textbook later.
B) Stop and go back through your notes to see if the questions were already answered in a previous class.
C) Write your questions down in your notes and ask your instructor about them later.
D) Keep your questions to yourself unless someone brings them up during your study group.