A polynomial is shown.

16x² - 48x +36

Select all the expressions that correctly represent the given polynomial in factored form.

a. 4(2x - 3)²

b. 16 (x²-3x+2)

c. (4x-6) (4x - 6)

d. 4 (2x+3)(2x - 3)

e. (4x² - 12x +9)