Research and discuss in your class the reasons for the increase in the handsome boy population.

If your gene pool has good-looking persons then you may have the chance to look like a handsome boy and get the attractive gene that your ancestors have.

Explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

i think the answer is c hope this