Ayşe: I watched a documentary about the scientist Aziz Sancar last night.
Mehmet: Oh, he is a Turkish scientist who won the Nobel Prize in Chemistry, right?
Ayşe: Yes, he discovered how cells repair damaged DNA. His work is very important for cancer treatment.
Mehmet: That's amazing! I want to be a scientist like him.
Which of the following questions does **NOT** have an answer in the conversation?
A)What did Aziz Sancar discover?
B)Why is his work important?
C)When did he win the Nobel Prize?
D)What does Mehmet want to be?