Six-year-old Charlie realizes that his sister remains a girl even when she operates a bulldozer. Charlie has acquired the concept of gender

Sierra is constantly worried that everyone whom she comes

in contact with is full of germs, so she is constantly rushing off to wash her hands. Sierra suffers from which psychological disorder? A) Clinical depression B) Obsessive-compulsive disorder C) Social anxiety disorder D) Schizophrenia

Who is performing a fine-motor skill?

a. Johnny, who is walking c. Vincent, who is scribbling with a pencil b. Guy, who is rolling over d. Juan, who is playing soccer