Which factor would INCREASE the carrying capacity for white-tailed deer in an Eastern temperate forest ecosystem?

A) The re-introduction of the Eastern cougar into North Carolina.
B) A large migration of the closely related mule deer, into the East.
C) The construction of new roads and increased traffic through woodland areas.
D) The re-introduction of the American chestnut tree, which produces many seeds, and used to live in North Carolina.