If you want to argue that one classmate of yours is not a good student, and as one premise for your thesis you will use the statement he always skips classes for computer games, which of the following statements could be a proper definition to be used in your argument?

A、A bad student is one who doesn’t place study as the number one job of a student.

B、A bad student is one who doesn’t excel in one’s study.

C、A bad student is one who bullies his classmates.

D、A bad student is one who teases his teachers.

正确答案：A bad student is one who doesn’t place study as the number one job of a student.