We Know That Light Is Quantized Because, in the Double

We know that light is quantized because, in the double slit experiment with light,

A) when the experiment is done in strong light, no interference pattern shows up on the screen.
B) an interference pattern shows up on the screen.
C) when dim light is used, the light hits the screen at tiny separated impact points.
D) when one slit is closed, the light hits the screen at tiny separated impact points.
E) when one slit is closed, no interference pattern shows up on the screen.