Which feature helps drivers monitor vehicles in their blind spots?

• A. Lane Departure Warning
• B. Parking Sensor System
• C. Blind Spot Monitor (BSM) with Rear Cross-Traffic Alert
• D. Adaptive Cruise Control

Answer: (C)

The main concept here is a feature that actively detects vehicles in your blind spots and warns you when it’s not safe to change lanes. A Blind Spot Monitor with Rear Cross-Traffic Alert uses sensors, usually in the rear corners of the vehicle, to keep track of cars in adjacent lanes that you might not see in your mirrors. When a vehicle is detected in a blind spot, the system provides a visual cue—often a light in the corresponding side mirror—and may give an audible alert if you indicate a lane change. Rear Cross-Traffic Alert extends that awareness to traffic approaching from the sides when you’re backing out of a space, warning you if a vehicle is coming so you can stop or adjust.

This is the best choice because it directly targets monitoring of blind spots and cross-traffic, which are exactly the scenarios where visibility is limited and a collision risk exists during lane changes or backing up. In contrast, Lane Departure Warning focuses on staying within your lane but doesn’t specifically monitor blind spots. Parking Sensor Systems alert you to obstacles while parking, not ongoing blind-spot monitoring during normal driving. Adaptive Cruise Control manages speed and following distance, not blind-spot awareness.