Medium speed engines have a _____ power to weight ratio than the slow speed two strokes, b

Medium speed engines have a _____ power to weight ratio than the slow speed two strokes, but due to the higher speeds tend to have _____ maintenance intervals.

A.higher/reduced

B.higher/increased

C.lower/reduced

D.lower/increased

请帮忙给出正确答案和分析，谢谢！