Professor Wyatt believes that 1-year-old Brian is at risk for autistic disorder. The professor might observe Brian to determine whether he a. fails to respond to his name. b. can walk without...

Professor Wyatt believes that 1-year-old Brian is at risk for autistic disorder. The professor might observe Brian to determine whether he

a. fails to respond to his name.

b. can walk without assistance.

c. responds appropriately to loud noises.

d. shows smooth pursuit with his eyes.