What is an appropriate response if another driver is tailgating you?

Answer: B — Change lanes, if safe, to allow them to pass

When another driver is tailgating you, the safest and most appropriate response is to change lanes, if it is safe to do so, thereby allowing the tailgater to pass. This action helps to reduce potential stress and conflict on the road. By moving over, you decrease the chance of an accident caused by the tailgater's impatience and aggressive driving behavior. Allowing them to pass not only promotes a safer driving environment but also enables you to maintain a safe following distance from the vehicle ahead. The other options are less effective. Abruptly braking could lead to a collision, as the tailgater may not have enough time to react. Ignoring the situation while maintaining your speed could escalate the tension and increase the likelihood of an accident if the tailgater decides to take risky actions. Waving your arms in annoyance could provoke road rage and further escalate the situation, endangering both drivers.