An engine is described as being a v-6, 90-degree engine. which one of the following statements about this engine is correct? a. a cylinder will fire once for every 90 degrees of crankshaft revolution. b. the angle between the two rows of cylinders is 90 degrees. c. the angle between the crankshaft and the camshaft is 90 degrees. d. the angle between each of the crankshaft journals is 90 degrees.