High beams should be used:

Whenever it is safe and legal to do so.. Section 2.11: Use high beams when it is safe and legal to do so. They let you see further.

High beams should be used:

ANSWER BREAKDOWN
  • A. Incorrect. "Whenever you can see less than 500 feet ahead." is not correct. Use high beams when it is safe and legal to do so. They let you see further.
  • B. Correct. Use high beams when it is safe and legal to do so. They let you see further.
  • C. Incorrect. "In fog." is not correct. Use high beams when it is safe and legal to do so. They let you see further.
  • D. Incorrect. "In the city." is not correct. Use high beams when it is safe and legal to do so. They let you see further.