the area to the rear of the car not seen in mirrors is\na not necessary for driver vision.\nb seen by…

the area to the rear of the car not seen in mirrors is\na not necessary for driver vision.\nb seen by adjusting mirrors.\nc a blind spot.\nd directly behind the car.
Answer
Brief Explanations:
The area to the rear of the car not seen in mirrors is defined as a blind - spot. Adjusting mirrors may not eliminate it completely, and it's an important area for driver awareness, not just directly behind the car.
Answer:
C. a blind spot.