The peppered moth population in a locality has light and dark moth varieties. Which moth variety is likely to survive if the environment of the locality becomes highly polluted? (3 points)

a
The dark variety, as they are not visible on the dark tree barks

b
The dark variety, as they are not visible on the light tree barks

c
The light variety, as they are not visible on the dark tree barks

d
The light variety, as they are not visible on the light tree barks