Spinka and His Colleagues Proposed That Play Behavior

Spinka and his colleagues proposed that play behavior:

A) should have measurable effects on somatosensory, motor, and emotion centers.
B) will not change over the lifetime of an individual, particularly if the frequency of unexpected events changes at a rapid rate.
C) can only be exhibited in animals that live in social groups.
D) allows animals to develop the physical and psychological skills to handle unexpected events in which they experience a loss of control.
E) c and d