Leonora is factoring a trinomial the factors of the trinomial are shown on the model which trinomial did she factor

If your choices are the following:
A.x2 + 4x – 12
B.x2 + 2x – 6
C.x2 – 8x – 6
D.x2 – 4x – 12

Then the answer is letter D

The answer is 

You multiply the x to the x.

Then you multiply the x to the ones, and the x to the negative ones. You combine the -1x to 1x to get -4x, because -6+2 is -4.

Lastly you multiply the negative ones to the ones, and combine like terms to get -12.

Since the quadratic form is , you plug in a, b, and c with 1. -4, and -12, so it looks like this: 

Ithink it would be 1.24 pounds