Final answer:
A driver with a BAC of 0.05% is 2 times more likely to cause a crash.
Step-by-step explanation:
The chance of causing a crash is not directly proportional to the Blood Alcohol Concentration (BAC), but it increases significantly as BAC rises. According to the example provided, if a driver reaches a BAC of 0.05%, their chance of causing a crash is 2 times more likely compared to being sober.