What Was the Main Factor That Led to Declines in Collared

What was the main factor that led to declines in collared lizard (Crotaphytus collaris) populations in the Ozark Mountains of Missouri in the United States?

A) Increased forest fires killed collared lizards and their preferred insect prey species.
B) Suppression of forest fires decreased the open habitat that collared lizards require.
C) Increased forest fires removed the cool, closed-canopy habitat that collared lizards require.
D) Suppression of forest fires led to an increase in the populations of collared lizard predators.