One Herd of Elephants (Herd A)has 100 Individuals and a Growth

One herd of elephants (Herd A) has 100 individuals and a growth rate of 1.5. Another herd (Herd B) has 200 individuals and a growth rate of .7. Herd C has a population of 75 and a growth rate of 2. Herd D has a population of 50 and a growth rate of 4. Assuming no other factors are involved, which herd will be largest next year?

A) Herd A
B) Herd B
C) Herd C
D) Herd D