I believe it's B. BRCA1 and BRCA2.
The correct answer is B, I know this because none of the other answers are even reasonable. For example-
A is wrong because the size of elephant tusk has not changed over time, elephant tusk just grow...
C is wrong because it makes no sense to hunt elephants with no tusk :/
D is completely wrong because tusk have nothing to do with reproduction, those are two completely separate bodily functions.........
You are giving your hypothesis.
The answer should be Environmental Protection Agency, because its the agency US federal government into mission of protecting environmental health or human health
Hope this helps.
