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

Genetics have no role; BMR is solely determined by weight and does not vary with composition, age, or sex.

Female sex, low lean mass, and older age because hormonal changes always increase basal metabolic demands.

Greater lean body mass (more metabolically active tissue), male sex (on average more lean mass), and younger adult age.

Higher body fat percentage, advanced age, and prolonged very low calorie intake because fat tissue requires more resting energy.