A forest ecosystem located in the northeastern United States currently contains 35 black bears. The ecosystem contains enough energy to support 42 black bears, enough water to support 54 black bears, and enough minerals to support 64 black bears. Assuming that this accounts for all of the resources needed by black bears in this ecosystem, how many additional black bears could the ecosystem support?
A.
160 additional black bears
B.
7 additional black bears
C.
29 additional black bears
D.
19 additional black bears
