Barb E. Dahl is a 72-year-old woman who is pleased that for the first time in her life she has finally been able to shed excess pounds without having to diet. In reality, however, Barb's weight loss is probably not so good because it is due to .

Complete question:

Barb E. Dahl is a 72-year-old woman who is pleased that for the first time in her life she has finally been able to shed excess pounds without having to diet. In reality, however, Barb's weight loss is probably not so good because it is due to .

a.) Loss of muscle mass.

b.) relative increase in cartilage.

C.) decrease in collagen

d.) reduction in glucose.

The correct option is A (Loss of muscle mass.)

Explanation:

72 year old Dahl didn't subject herself to eat certain foods( dieting). And for the first time in her life she lost some weight as she advanced in age without dieting. This type of weight loss is associated with decrease in muscle mass. This involves reduction in number of muscle fibres as a result of changes in muscle synthesis signalling pathways and gradual failure in the satellite cells which help to regenerate skeletal muscle fibres. All these occurs as an individual advances in age and should be treated if not could lead to decrease in immunity. Therefore it can be managed through:

- Resistance exercise and

- Protein supplementation.

70 % i think is the answer.