下列哪种表现对膝关节脱位的诊断无特殊意义？（）

A.患膝疼痛、功能障碍

B.患膝明显畸形

C.弹性固定

D.X线片

E.以上均有意义

A 72-year-old client seeks help for chronic constipation. This is a common problem for elderly clients due to several factors related to aging. Which of the following is one such factor（）

A. Increased intestinal motility.

B. Decreased abdominal strength.

C. Increased intestinal bacteria.

D. Decreased production of hydrochloric acid.