Which characteristic most strongly indicates that a weight is 'healthy' according to course concepts?

A weight that is at the lower edge of the BMI scale regardless of how it is achieved, because lower BMIs always equal lower disease risk.

A weight that mirrors the average weight of peers, because social conformity is the best measure of health.

A weight that is appropriate for the individual's age, height, and sex and can be maintained through sustainable lifestyle choices without constant dieting.

A weight achieved primarily through short-term restrictive dieting, because rapid weight changes show strong metabolic control.