Which of the Following Questions Is Designed to Assess Capacity

Which of the following questions is designed to assess capacity for functional activities and participation when interviewing a patient who suffered a stroke?

A) How much of a problem do you have in walking long distances?
B) Is the problem of walking made worse or better by use of an assistive device?
C) How much difficulty do you have walking a quarter of a mile?
D) How much of a problem do you have going up and down stairs?