The Picture Below Is a Hippocampal Section from an Animal

The picture below is a hippocampal section from an animal injected with tritiated thymidine shortly after birth and sacrificed two weeks later. What can you conclude from this image?

A) no cell division has occurred during this two-week period of time
B) the rate of cell division seems to be slower than before birth
C) the presence of radioactive thymidine in the image indicates DNA synthesis has occurred
D) all of the cells in the image are neurons
E) all of the above