Correct Response: C. Automotive starters most commonly consist of a simple DC brushed motor with a retractable drive gear that pops out when the starter is engaged. Because most automotive electrical systems use 12 volts DC, it does not make sense to use an AC motor such as an AC induction motor (A) or an AC synchronous motor (B). Even if the system were AC, it would be highly unlikely that something as sophisticated as a synchronous motor would be used. A DC stepper motor (D) would not make sense for this application since these are designed for situations where the exact rotational angle of the motor can be controlled precisely. For a starter, a motor that simply spins when energized is all that is needed.
