Which of the Following Statements Concerning Swimming Is True

Which of the following statements concerning swimming is true?

A) Swimming is less damaging to joints compared to most other forms of aerobic exercise.
B) Swimming is usually a more effective weight-loss method than jogging or bicycling.
C) A woman must swim laps for 45 minutes or longer to gain aerobic benefits.
D) Swimming builds muscle but is not an effective form of aerobic exercise.