Researchers Investigated the Reduction of Littering in Three High School

Multiple Choice

Researchers investigated the reduction of littering in three high school classrooms.Which class still showed a reduction in littering two weeks after the study ended?

A) The class that was told that they should be neat and tidy
B) The class reprimanded repeatedly for littering
C) The class congratulated for being neat and tidy
D) The class whose littering was ignored