If Older Adults Engage in Weight-Bearing Exercises, Which Measure Should

If older adults engage in weight-bearing exercises, which measure should be taken to reduce the risk of injury?

A) Limit exercise sessions to no more than 20 minutes, three days per week.
B) Always work out with a trainer; never work out alone.
C) Purchase special shoes to protect the bones of the feet.
D) Use balance support to avoid falls.