Answer:
D
Step-by-step explanation:
Peppered moths were originally more white in coloring due to needing to be able to blend into the trees. But during the industrial revolution, more smog and soot was being produced, causing the trees to become more black in color, making it harder for the moths to blend in. Therefore, resulting in the need for genetic mutations within the moths to help them better blend into their surroundings to avoid predators. (I just recently took this test too)
Hope this helps :)