What should be done if the windshield wipers are not functioning?

Answer: B — Replace them immediately before driving

If the windshield wipers are not functioning, it is crucial to replace them immediately before driving. Windshield wipers are an essential safety feature of the vehicle, as they provide visibility during various weather conditions, particularly rain, snow, or sleet. Without functioning wipers, a driver’s ability to see the road clearly can be severely compromised, leading to dangerous driving conditions and increased risk of accidents. The other options may seem like temporary solutions, but they either fail to address the fundamental safety concern or could exacerbate the issue. Manual towel drying might help in the short term but is not practical during driving and does not ensure that the driver's visibility will be restored adequately. Checking for proper installation does not guarantee that the wipers will work, and using them regardless can lead to further mechanical failure or unsafe driving conditions. Ignoring the problem entirely, especially when it’s sunny, does not negate the potential danger; unexpected weather changes can occur suddenly, making non-functional wipers a severe risk. Therefore, immediate replacement is vital for maintaining safe driving conditions.