We have a polynomial with factors (x+2) and (x+6), thats mean that the polynomial has the form:
Q) The question ask us about the values of x that make that polynomial equal to 0. i.e we want to find the values of x such that we have:
A) Looking the last equation we see that if we replace x by -2 or x by -6 we get the polynomial equal to 0!
So the correct answer is letter A.