You are writing an expository essay on whether or not online classes are as effective as face-to-face classes.
Which statement would be the best thesis for this piece of writing?

A) One reason that online classes appeal to many people is because of their cost and their convenience.
B) The benefits of online classes versus face-to-face classes is a debate that has many different aspects and approaches, both positive and negative.
C) Face-to-face classrooms have the benefit of allowing students to immediately interact with their teachers and get instant feedback on difficult issues.
D) While Mary Margaret rushes out the door to get to class on time, Jennifer wakes up and simply turns on her computer while eating breakfast to start her academic day.