Question

before changing lanes on a multi-lane highway you should: sound your horn turn on your headlights reduce your speed check your mirrors and blind spots

Explanation:

To determine the correct action before changing lanes on a multi - lane highway, we analyze each option:

• Sounding the horn is not a standard or necessary action for lane changing. It is more for alerting in emergency or specific situations, not a routine lane - changing step.
• Turning on headlights is related to visibility in low - light conditions, not directly to the safety of lane changing.
• Reducing speed is not a typical pre - lane - changing action. Lane changing is usually done at a consistent speed (adjusting speed is more for merging or exiting).
• Checking mirrors and blind spots is a crucial safety step before changing lanes. It helps the driver be aware of other vehicles around them to avoid collisions.

Answer:

D. Check your mirrors and blind spots