What is the correct sequence for checking mirrors and blind spots before changing lanes?

What is the correct sequence for checking mirrors and blind spots before changing lanes?

• A. Check rearview and side mirrors, signal, then check over your shoulder for the blind spot before moving.
• B. Signal, then check mirrors, then shoulder check, then move.
• C. Check blind spots only after moving.
• D. Check mirrors after you start the lane change.

Answer: (A)