Marty, a 45-Year-Old Female, Wants to Improve Her Physical Fitness

Marty, a 45-year-old female, wants to improve her physical fitness. You recommend that she engage in:

A) moderate physical activity most days of the week for 15 minutes.
B) moderate physical activity most days of the week for 45 minutes.
C) moderate physical activity most days of the week for 30 minutes.
D) 150 minutes of moderate physical activity per week.