Ineed the answer to the question in the picture

In order to find the correct answer, you'll need to fill in the factors for x for each answer.

A: -7^2 --6-42 is -85, which is not equal to 0.

B: 7^2 -6-42 is 1.

C: -7^2 -6-42 is -97, which is not equal to 0.

D. 7^2 --6-42 is 13, which is not equal to 0.

I'm going to have to say B. x=7, x=6.