【单选题】The camshaft drive is designed to maintain proper camshaft speed relative to crankshaft speed.
A.
maintaining this relationship, the camshaft drive causes the camshaft to rotate at ______
B.
one-half crankshaft speed in a two-stroke cycle diesel engine
C.
crankshaft speed in a two-stroke cycle diesel engine
D.
two times crankshaft speed in a two-stroke cycle diesel engine
E.
one-fourth times crankshaft speed in a four-stroke cycle diesel engine