What should you do if your vehicle has a blind spot?

Answer: C — Check blind spots physically

When driving, it's crucial to be aware of blind spots—areas around your vehicle that cannot be seen by your mirrors. Physically checking blind spots is the most effective way to ensure that there are no vehicles or obstacles present before changing lanes or merging. This involves turning your head to visually confirm that the area is clear, thereby enhancing your situational awareness and ensuring the safety of both yourself and other road users. Using only mirrors may not provide a complete view of the areas adjacent to your vehicle, as mirrors can hide certain angles. Honking before changing lanes may alert others, but it doesn't address the potential risks from vehicles hidden in your blind spot. Accelerating quickly could lead to unsafe driving behaviors, such as losing control or not being able to properly monitor your surroundings, which could increase the risk of an accident. Thus, the most prudent and safe approach is to physically check your blind spots.