The following is considered a special vehicle...
A)The agricultural tractor.
B)The agricultural trailer.
C)Both of the above answers are correct.Correct
SPECIAL VEHICLE: A self-propelled or towed vehicle, conceived and built to carry out specific works or services and which, due to its characteristics, is exempt from meeting some of the technical conditions required by this Regulation or permanently exceeds the limits established therein for masses or dimensions, as well as agricultural machinery and its trailers.
Special vehicles include the agricultural tractor, motor cultivator, self-propelled machine, agricultural trailer, etc.