The revolving armature type alternator is capable of _____ power output and is, therefore, _____ often used than the revolving field type.

A) less; more
B) less; less
C) more; less
D) more; more

The revolving armature type alternator is capable of less power output due to limitations such as difficulties in insulation at high voltages, and it is therefore less often used than the revolving field type, which can handle higher power outputs more efficiently.