Evidence That Obesity Is Influenced by Factors in Addition to Genetics

Evidence that obesity is influenced by factors in addition to genetics includes the fact that

A) mice injected with daily doses of leptin become less active and gain weight.
B) people lose a pound of weight for every reduction of 3500 calories in their diet.
C) the weights of adopted people are highly correlated with the weights of their adoptive parents.
D) jobs in the United States requiring moderate physical activity have declined since 1960.