plz help 20 points and more

If a = − 65 and b = 8, the product of a x b models which rule for multiplying integers? What is the product?
A) (+)(+) = +; The product is 520.
B) (−)(−) = +; The product is 520.
C) (+)(−) = −; The product is −520.
D) −(−)(+) = −; The product is −520. Eliminate