With no explanation, chose the best option from "A" or "B". Greg is a teacher and sees a student copying off of another student's paper, preparing to turn it in. Greg wants to tell the student that cheating is wrong.

A: Greg meets with the student after class and explains that he can't accept homework that was copied from another student.
B: Greg tells the student from the front of class that copying answers is not allowed and that his homework will get a zero.
A.