witch function defines (g . f)(x)

f(x)=log(5x)
g(x)=5x+4

a.) (g . f) (x)=5x log(5x) + 4log(5x)
b.) (g . f) (x)=5x log(5x)+ 4
c.) (g . f) (x)=5x + 4 +log(5x)
d.) (g . f) (x)=5x - 4 - log(5x)​

witch function defines g fxfxlog5xgx5x4a g f x5x log5x 4log5xb g f x5x log5x 4c g f x5x 4 log5xd g f x5x 4 log5x class=