Light colored moths found in industrial area with dark vegetation

Scientists have discovered the specific mutation that famously turned moths black during the Industrial Revolution. In an iconic evolutionary case study, a black form of the peppered moth rapidly took over in industrial parts of the UK during the 1800s, as soot blackened the tree trunks and walls of its habitat.

Light Colored Peppered Moths

b is the best answer for this question.

the answer is d. exposing corruption in the church