植物进行水分蒸腾作用的主要器官是（　　）

A．根

B．茎

C．叶

D．花

Which of the following is the most appropriate activity for the nurse to assess motor strength for a neurologically injured client（）

A. Compare equality of hand grasps.

B. Observe spontaneous movements.

C. Observe the client feed himself.

D. Ask the client to signal if he feels pressure applied to his feet.