Fertilizer, waste Water ,automobile,exhaust,animal waste
I'm not sure but but i think the answer will be:
A. additive genetic variance times the selection differential.
The limitation is that she can't test is on humans for ethical reasons. In order to test this, theoretically, she would need to ask some women to use this cosmetic and compare their fetuses to the fetuses of women who didn't. But this is not likely to be approved by the ethical committee, as causing damage to a fetus is not ethical.
C. The answer should be c, seeing as how bacteria die under high heat.
