Many studies have indicated that there is some genetic influence on body weight and composition. researchers have established a variety of theories that attempt to explain why some individuals gain weight more easily than others and why weight can be so difficult to change long-term. choose the correct statement about theories regarding genetic influence on weight status.

a. the thrifty gene theory suggests that some individuals have a "thrifty metabolism," which could a person survive when food is scarce.

b. according to recent research, the fto gene may increase feelings of satiety.

c. the set point theory indicates that bodies are meant to stay within a narrow weight range, which cannot be changed long-term.

d. drastically reducing calorie intake causes bmr to increase, which individuals deviate from their "set point" for weight