All of the following statements are true EXCEPT:
A. a typical wiper motor has either two or three speeds.
B. a typical permanent magnet motor has three brushes, one of which is a common ground.
C. intermittent wipers allow the driver to vary the time interval a wiper sweeps across the windshield during foggy or misty conditions.
D. electromagnet wiper motors have four brushes on the armature.
Answer: D
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