Question

The cubic polynomial with leading coefficient unity all whose roots are 3 units less than the roots of the equation x³−3x²−4x+2=0 is denoted as f(x), then f′(x) is equal to:
A. 3x²−12x+5
B. 3x²+12x+5
C. 3x²+12x−5
D. 3x²−12x−5