Suppose That We Are Discussing Whether or Not a Class

Suppose that we are discussing whether or not a class should allow more time for discussion.Which of the following would be an example of a straw man argument?

A) We can't turn the entire class period into an aimless bull session because then no one would learn anything.
B) We need to allow more time for discussion because that would help students to be more engaged in the material.
C) We need to allow more time for discussion because that would give the lecturer a chance to rest his or her voice.
D) We should not allow more time for discussion because that would make it harder to get through all of the material.
E) We should not allow more time for discussion because this class is too large for discussion to be managed effectively.