Which set of factors would most likely produce a higher BMR relative to body mass?

• A. Genetics have no role; BMR is solely determined by weight and does not vary with composition, age, or sex.
• B. Female sex, low lean mass, and older age because hormonal changes always increase basal metabolic demands.
• C. Greater lean body mass (more metabolically active tissue), male sex (on average more lean mass), and younger adult age.
• D. Higher body fat percentage, advanced age, and prolonged very low calorie intake because fat tissue requires more resting energy.

Answer: (C)