Which formula can be used to describe the sequence?
-3, 3/5, -3/25, 3/125, -3/625
A. f(x) = -3(1/5)^x-1
B. f(x) = -3(1/5)^x-1
C. f(x) = -1/5(3)^x-1
D. f(x) = -1/5(-3)^x-1