Which statement from a client with one weak leg regarding use of crutches when using stairs indicates a need for increased teaching? a. "The weaker leg always goes first with both crutches." b. "Going up, the strong leg goes first, then the weaker leg with both crutches." c. "Going down, the weaker leg goes first with both crutches, then the strong leg." d. " A cane or single crutch may be used instead of both crutches if held on the weaker side."