According to Research Done by Miller and His Colleagues (1975),if

According to research done by Miller and his colleagues (1975) ,if you want young children to put trash in wastebaskets,you should repeatedly:

A) tell them that they should be neat and tidy.
B) congratulate them for being neat and tidy.
C) punish them for not putting trash in wastebaskets.
D) tell them that people who litter are bad.