Hailey simplified the expression (12xy74x4y3)2 using the following steps:

Step 1: (3x−3y4)2

Step 2: 3x−6y8

Step 3:3y8x6

Did Hailey correctly simplify the expression?
A
Yes, Hailey correctly simplified the expression.

B
No, in Step 1, Hailey should have added the exponents instead of subtracting them.

C
No, in Step 2, Hailey should have squared each exponent value instead of multiplying each value by 2.

D
No, in Step 2, Hailey should have also multiplied the exponent of the coefficient by 2 to get 32.