The correct answer is the following: option a. Drivers must be careful when driving close to cyclists and should keep at least three feet apart when passing cyclists on the road. Three feet from the widest point of both vehicles is the minimum safe distance to keep when slow driving. At less than three feet both the cyclist and the driver have less space for safe maneuvering in the case of an unexpected event, like loosing control or another vehicle such as a motorist getting too close.