Before changing lanes or attempting to pass another vehicle, you should:

1. Check your blind spots and mirrors.
2. Signal your intention before changing lanes.
3. All of the above. ✓

Answer: C. All of the above.

You should do all of these: signal your intention, check your mirrors, and check your blind spots before changing lanes or passing another vehicle.

Why this is the answer

The handbook's lane-change checklist starts with signaling, then checking your mirrors, then looking over your shoulder and checking blind spots for vehicles, motorcyclists, and bicyclists. It also says to make sure the next lane has enough room. Another section reminds you to check for bicyclists when changing lanes because they can be hidden in blind spots. Since signaling and checking mirrors and blind spots are both required, the choice that includes both is correct.

Why the other answers are wrong

• A. Check your blind spots and mirrors. — Checking blind spots and mirrors is required, but the handbook also tells you to signal before the lane change, so this choice leaves out a required step.
• B. Signal your intention before changing lanes. — Signaling is required, but it is not enough by itself because the handbook also directs you to check mirrors and blind spots before moving.

Remember it

Think of a lane change as a three-part check: signal, mirrors, and a look over your shoulder.