What action should a driver take when encountering an animal crossing sign?

Answer: B — Be cautious

When a driver sees an animal crossing sign, the appropriate action is to be cautious. These signs indicate that there may be wildlife in or near the roadway, particularly in areas where animal crossings are common. Being cautious involves reducing speed and being alert for any animals that may appear suddenly on the road. This helps prevent accidents and ensures the safety of both the driver and the animals. Choosing to speed up could lead to a dangerous situation where an animal unexpectedly crosses the road. Ignoring the sign dismisses the warning altogether, which could result in a collision. Stopping immediately might also be unnecessary and could potentially cause accidents with vehicles behind you. Therefore, exercising caution by slowing down and being aware of your surroundings is the best response when encountering this type of warning sign.