PTE Listening MC Single: What did the student realize at the end of the conversation?

What did the student realize at the end of the conversation?

• A.Miss Davis made the student realize that Ms. McKenna is a good teacher.
• B.Miss Davis made the student realize that nothing is possible.
• C.The student realized that she can do things if she tries hard.
• D.Miss Davis made the student realize that nothing is important but math.