Final answer:
A BAC of .05% indicates alcohol intoxication, which significantly increases the driver's chance of causing a crash due to impaired judgment, coordination, and reaction time.
Step-by-step explanation:
According to the given information, a BAC (Blood Alcohol Concentration) of .05% would indicate alcohol intoxication. At this level, the driver's chance of causing a crash increases significantly. Alcohol impairs judgment, coordination, and reaction time, which are crucial for safe driving. It is important for drivers to realize that even a small amount of alcohol can have negative effects on their ability to drive safely.