The Ridge at the Top of the Cylinder ________

Multiple Choice

The ridge at the top of the cylinder ________.

A) Represents a failure of the top piston ring to correctly seal
B) Means that a crankshaft with an incorrect stroke was installed in the engine
C) Is caused by the fact that the rings do not travel all the way to the top of the cylinder
D) Should not be removed before removing pistons except when reboring the cylinders