Which Attempt by the Family to Prevent an Older, Frail

Which attempt by the family to prevent an older, frail adult from falling causes the home health nurse concern?

A) Keeping several low wattage night-lights on in the evening
B) Installing wooden railings on the stairway to the bathroom
C) Keeping the side rails up on the client's bed at night
D) Encouraging the client to use a cane when ambulating