Driveshaft Speed Variation Is Being Discussed

Multiple Choice

Driveshaft speed variation is being discussed. Technician A says the speed variations at the transmission yoke end of the driveshaft are canceled out by the speed variations at the pinion flange end. Technician B says the operating angles at each end must be equal for the speed variations to cancel each other out. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B