Question

when you are towing a trailer:
a. you must not drive faster than 45 mph
b. the trailer must not swerve from side to side at any speed
c. you must have special permission from the state to do so
d. all of the above

Explanation:

• Option A: There's no universal 45 mph speed limit for towing trailers; speed limits vary by location and situation.
• Option C: Towing a trailer generally doesn't require special state permission (unless for oversized/overweight, but not in general).
• Option B: A trailer swerving side - to - side (trailer sway) is dangerous at any speed, so it must not occur.

Answer:

B. The trailer must not swerve from side to side at any speed