Schuett's Research on Corticosterone and Fighting in Copperhead Snakes (Agkistrodon

Schuett's research on corticosterone and fighting in copperhead snakes (Agkistrodon contortrix) demonstrated that:

A) losing males do not court available females.
B) plasma corticosterone levels were significantly greater in losers than in winners or controls.
C) losing males rarely challenged other males.
D) circulating corticosterone levels were not influenced by contest length.
E) all of the above