What is the function of an engine’s stationary parts？A.To add power to the engineB.To keep

What is the function of an engine’s stationary parts？

A.To add power to the engine

B.To keep the engine firmly attached to its supporting base

C.To keep moving engine part in their proper relative positions

D.To rotate the crankshaft

请帮忙给出正确答案和分析，谢谢！