Which of the Following Produces a Substantial Increase in the Caloric

Multiple Choice

Which of the following produces a substantial increase in the caloric intake of laboratory rats and a significant increase in their body weight?

A) removing thiamine from their usual laboratory chow
B) adding thiamine to their usual laboratory chow
C) offering them a cafeteria diet, rather than their usual single-chow laboratory diet
D) sham feeding them
E) both C and D