Which child is at the greatest risk for overweight? 
 a. Cecilia, who watches 1 hour of TV in the family room each day 
 b. Leo, who watches 2 hours of TV and Internet with ads in his bedroom each day 
 c. Travis, who uses an ad blocker to screen out ads during his 1½ hours of screen time each day 
 d. Marcella, who watches 1½ hours of TV in the living room each day