Mackenzie Is Taking Physics This Term, but the Class Is

Mackenzie is taking physics this term, but the class is turning out to be more difficult for her than she expected. Even though she pays attention during lectures and takes good notes, she is having trouble understanding the practical applications of the principles and formulas presented in class. She decides that she needs to discuss the matter with her instructor. What would be the most appropriate way for Mackenzie to discuss her difficulties with her instructor?

A) over the phone
B) face-to-face
C) through e-mail
D) using the class's online discussion board