pls answer asap, just A B C D would suffice. thanks :)

8. (3 points) Let f : R - R be a twice continuously differentiable function, i.e., f" # /2 exists and is continuous. Then (f"(x) +4f(x)) cos 2x dr (a) is -(f'(0) + f'(m/2)) (b) is -(f(0) +f(*/2)) (c) is f'(0) - f'(#/2)) (d) None of them