You are driving car A in heavy traffic. Up ahead you see car B just beginning to leave its parking space. You should?

Slowing down and being prepared to stop is the appropriate action to take in this situation. When you observe another vehicle starting to pull out of a parking space, it indicates that they may not be fully aware of the traffic around them, and they could enter your path unexpectedly. By slowing down, you give yourself the flexibility to react if car B pulls out suddenly. This cautious approach helps prevent a collision and ensures that both you and the other driver can navigate the traffic safely.

In heavy traffic, it’s crucial to maintain a safe following distance and to anticipate the actions of other drivers. Being prepared to stop allows you to adapt to sudden changes in the traffic environment. The other options suggest more aggressive maneuvers that could increase the risk of an accident, particularly in congested conditions where your path and that of the other vehicle are likely to intersect.