Ali: I think the scientific discovery of «vaccination» is the most important because it saved millions of lives.
Berna: I agree, but I believe «penicillin» is also crucial because it treats bacterial infections.
Cem: What about the «microscope»? It lets us see tiny organisms.
Ali: True, but without vaccination, many diseases would still be widespread.
Which of the following questions is answered in the conversation?
A)What did Berna say about the microscope?
B)Why does Ali think vaccination is important?
C)Who invented the microscope?
D)When was penicillin discovered?