Some steps to rewrite the expression x^3 − 9x + x^2 − 9 as a product of three factors are shown below:


Step 1: x^3 − 9x + x^2 − 9

Step 2: x^3 + x^2 − 9x − 9

Step 3: x^2(x + 1) − 9(x + 1)


Which of the following best shows the next two steps to rewrite the expression?

AStep 4: (x^2 + 9)(x + 1); Step 5: (x + 3)(x + 3)(x + 1)

BStep 4: (x^2 − 9)(x + 1); Step 5: (x + 3)(x + 3)(x + 1)

CStep 4: (x^2 + 9)(x + 1); Step 5: (x − 3)(x + 3)(x + 1)

DStep 4: (x^2 − 9)(x + 1); Step 5: (x − 3)(x + 3)(x + 1)