When should you use your low beams?

Answer: B — Both A and B

You should use your low beams both at night in the city and in foggy or misty weather. Low beams are used when driving at night in the city to provide adequate visibility for both yourself and other drivers without blinding them with the high beams. In foggy or misty weather, low beams should be used because high beams can reflect off the moisture droplets in the air and create a glare, reducing visibility even further. Therefore, the correct answer is B.