What must a driver do to reinstate their license after a first DUI offense?

Answer: B — File proof of financial responsibility

To reinstate a driver's license after a first DUI offense in Nevada, filing proof of financial responsibility is a critical step. This typically involves obtaining a form of insurance known as an SR-22, which demonstrates that the driver has the necessary amount of liability coverage required by law. This indication of financial responsibility is necessary to ensure that the driver can cover costs associated with any potential future accidents or damages. While taking a written test or completing a traffic school course can be part of the overall process for some offenses or situations, they are not universally required for the reinstatement after a first DUI. Therefore, while those options might be relevant in certain contexts, the fundamental requirement specific to reinstating a license after a first DUI offense is the proof of financial responsibility. This reinforces the notion that drivers must be accountable and ensure they are financially equipped to handle their responsibilities on the road.