At her cousin's birthday party, Sarah sticks two straws up her nose and makes a funny face. The other children laugh. When her mother sees what she is doing, she
gives Sarah a dirty look and tells her to stop it. Which behavior was positively
reinforced?
a) the dirty look.
b)no behavior was positively reinforced.
c) sticking straws in her nose and making a silly face.
d) laughing.