The history of the human species has been marked mostly by shortages of food,

A) which would make a "thrifty" metabolism a survival advantage.
B) which lends support to the concept of the set-point.
C) which casts doubt on the positive incentive model.
D) which casts doubt on the role of hormones in weight regulation.

Thrifty Metabolism

A theory suggesting some individuals' bodies are more efficient at storing fat and using energy, historically advantageous but now possibly linked to obesity.

Food Shortages

Situations where the supply of food is insufficient to meet the demand, often resulting in hunger, malnutrition, and social unrest.

Set-Point

A theory suggesting that the body naturally maintains a certain weight by regulating feelings of hunger and metabolism.