Regarding Learning Principles Being Applied to Recycling Efforts, Which of the Following

Multiple Choice

Regarding learning principles being applied to recycling efforts, which of the following statements is/are TRUE?

A) People who set their own goals for recycling tend to meet them.
B) When factories, work groups, and dorms receive feedback, on a weekly basis about how much they recycled, they typically recycle more.
C) Recycling is more effective when entire families participate, with some family members reinforcing the recycling behavior of the other family members.
D) All of these statements are true.