For this case, the trinomial sought is the following:
(x-p) * (x-q)
Rewriting we have:
x^2 -qx-px + (- p) * (- q)
x^2 - x (q + p) + (- p) * (- q)
Where we observe that the constant term is the one that does not depend on x
(-p) * (- q)
answer
D. The product of -p and -q