Azrin, Holz, and Hake's (1963) Study on Punishment and Food

Azrin, Holz, and Hake's (1963) study on punishment and food deprivation in pigeons demonstrated that:

A) The more food deprived the pigeons were, the higher the efficacy of the punisher
B) The more food deprived the pigeons were, the lower the efficacy of the punisher
C) The type of food reward in relation to deprivation changes the efficacy of the punisher
D) The efficacy of the punisher remained constant regardless of the level of deprivation