Researchers are studying lichens growing on trees in a forest
ecosystem. At the beginning of the study, the researchers
identified 12 lichen species in the forest. Later, a forest fire
happened in the study area. The researchers returned to the
area and found only 6 lichen species.
A. Most lichen species are unaffected by the forest fire.
B. Certain lichen species are better adapted to survive forest fires
than others.
C. The biodiversity in the forest increases after a fire.
D. Forest fires will always permanently remove the same species from
the ecosystem.

Please help!!!