Question

the main advantage of the distributorless ignition system is the elimination of all the mechanical parts included in a distributor assembly such as all of the following except:
a. bushings.
b. bearings.
c. the breaker plate assembly.
d. cam angle sensors.

Explanation:

In a distributorless ignition system, mechanical parts of a distributor assembly (like bushings, bearings, breaker plate assembly) are eliminated. Cam angle sensors are electronic components used in modern ignition systems (including distributorless ones) to determine engine timing, so they aren't mechanical parts of a distributor assembly that get eliminated here.

Answer:

d. Cam angle sensors