Louis, a 7-year-old, has a hard time keeping friends. Although he can be very friendly and outgoing, he is inattentive to classmates. During recess, he acts impulsively, often running from group to...

Louis, a 7-year-old, has a hard time keeping friends.

Although he can be very friendly and outgoing, he is

inattentive to classmates. During recess, he acts impulsively, often running from group to group and interrupting their games. Louis’s behavior is most consistent with

having ______.
a) autism spectrum disorder
b) attention-deficit/hyperactivity disorder
c) Asperger’s syndrome
d) a motor disorder