Object A crashes into object B. A is more massive than B. Which is a true statement?

a. A experiences an impulse
b. B experiences an impulse
c. Both A and B experience an impulse of equal magnitude
d. Both A and B experience an impulse, but the impulse on B is greater

I say C.

As you have written it, a, b, and c are all true. If the word "only" were at the beginning of a and b, they would not be true.