The near annihilation of the american bison (bison bison) has restricted its occurrence to a few protected remnants and preserves in which biome?

Considering the answers

a) Midlatitude broadleaf and mixed forest

b) Midlatitude grassland

c) Boreal and montane forest

d) Tropical savanna

I believe the answer is B; Midlatitude grassland.

Midlatitude grassland are most modified by human activity, known as the bread baskets. Grass is a dominated feature of the plains.