Vehicles marked by a slow moving vehicle sign
a. are generally incapable of traveling at more than 25 mph.
b. may be constructed in a way that makes it difficult for the driver to see vehicles behind.
c. are often large in size.
d. all of the above

Vehicles marked by a slow moving vehicle sign are generally incapable of traveling at more than 25 mph.

Option: A

Explanation:

A moderate moving vehicle (or SMV) is a vehicle or escort of vehicles took a shot at a street or road at speeds more delayed than that of other automated traffic.

The articulation "moderate moving vehicle" is usually applied to equipment and vehicles, for instance, farm gear (tallying tractors), improvement gear, trucks towing trailers, or any such vehicles which can't work over a foreordained speed.

It excludes vehicles routinely known to far-fetched be worked at that speed or unequipped for landing at that speed, for instance, bicycles, mopeds and weakened vehicles being towed.

answer:

c

explanation:

the united states presidential state car (nicknamed "the beast", "cadillac one", "first car"; code named "stagecoach") is the official state car of the president of the united states.