Which of the following are an advantage of using an elliptical machine instead of a treadmill?

(Select all that apply.)

An elliptical machine can provide a lower impact workout than a treadmill.
An elliptical machine can provide a non-weight-bearing workout compared to a treadmill.
An elliptical machine can provide both an upper and lower body workout.
An elliptical machine can provide a higher impact workout than a treadmill.