It Is Commonly Expected That as a Person Ages, Their

Multiple Choice

It is commonly expected that as a person ages, their muscle mass decreases. To further examine this relationship in women, a nutritionist randomly selected 60 female patients from her clinic, 15 women from each 10-year age group beginning with age 40 and ending with age 80. For each patient, her age and current muscle mass was recorded. A scatterplot, least squares regression line, and coefficient of determination are as follows.
-Can these results be generalized to the population of all patients at this clinic?

A) Yes, since it was a random sample.
B) No, since the sample size was too small.
C) No, since only female patients were selected.
D) No, since age was not randomly assigned to patients.