Which of the Following Would Most Likely Reduce Stress and Boredom

Multiple Choice

Which of the following would most likely reduce stress and boredom in a space habitat?

A) active, group-oriented recreation
B) changing sleep stations, desks, lockers, and pastimes every three days
C) including live animals and plants in space habitats
D) changing the environment, such as "up" and "down" orientation of furniture, etc.