Final answer:
The duration of a license suspension for accumulating 15 demerit points can vary by location, but a common penalty is a 30-day suspension.
Step-by-step explanation:
When a driver accumulates 15 demerit points, their license is suspended. The specific duration of the suspension can vary by jurisdiction, as traffic laws and penalties differ from one place to another. In some jurisdictions, for instance, accumulating 15 demerit points may result in a 30-day suspension, which matches option (c) in the multiple-choice list provided. It's crucial for drivers to familiarize themselves with the regulations of their specific location to understand the exact penalties they could face.