Sometimes a Student with Learning Disabilities Is Said to Have

Sometimes a student with learning disabilities is said to have "a motor that is always running." Why?

A) Because she or he tends to exhibit clumsiness and lack motor competence.
B) Because he or she tends to be extremely extroverted and as a result will take on high risk challenges.
C) Because she or he tends to exhibit hyperactivity, which is typified by constant movement and overt activity at inappropriate times.
D) Because he or she tends to be regarded as an outcast and usually avoids social interactions with peers.