Which of the following functions should be used to differentiate f(x) = (8x2 - 14x)e^x?

A) f'(x) = (16x - 14)e^x
B) f'(x) = (8x2 - 14x)e^x
C) f'(x) = (8x2 - 14x)e^(x-1)
D) f'(x) = (16x - 14)e^(x-1)