Final answer:
An example of a failure in a car cruise control system is when it stops maintaining a set speed upon adjustments to the radio volume, indicating a software bug or design flaw that inadvertently links cruise control to unrelated car systems.
The correct answer is option c.
Step-by-step explanation:
An example of a failure in a car cruise control system would be 'C. The system stops maintaining a set speed when the radio volume is increased or decreased.' This indicates a malfunction as the cruise control system should be able to maintain the car’s set speed regardless of unrelated functions like the car’s audio system volume control.
A cruise control system is designed to monitor and adjust the car's speed to match a preset speed by the driver. A failure in this system occurs when it fails to perform this primary function due to internal errors, external disturbances, or incorrect integrations with other car systems.
For instance, if increasing or decreasing the radio volume inadvertently alters the cruise control setting, this suggests a software bug or a design flaw where the cruise control system's functionality is improperly linked to another system within the car.