PBT results are used to help determine ______________.

The correct response centers on the role of Preliminary Breath Test (PBT) results in guiding law enforcement decisions during traffic stops or encounters with suspected impaired drivers. PBT results provide immediate feedback on whether an individual's blood alcohol concentration (BAC) is at or above the legal limit, allowing officers to assess the situation before making a possible arrest. This on-the-spot assessment is crucial as it helps officers determine if there is probable cause to proceed with an arrest based on the driver's level of impairment.

Other options relate to aspects of legal processes that typically occur after an arrest or formal charges have been established, such as the decision about charges, the severity of the offense, or bail amounts—all of which would not require PBT results directly for their determination. PBTs are primarily utilized at the initial stages of interaction to inform the officer's immediate next steps regarding potential arrest.