A client has been placed on levodopa to treat his Parkinson’s disease. Which of the following is a common side effect of levodopa that the nurse should include in the client’s teaching plan

A. Pancytopenia.
B. Peptic ulcer.
C. Orthostatic hypotension.
D. Weight loss.

甲从邻居男孩乙手中骗得房门钥匙一把，随即作了模仿及压制，后还了钥匙。一日，甲拿着仿制的钥匙去乙家开门行窃，因钥匙仿制不准，未能成功，准备回家加工后继续作案，此时被他人抓获。甲的行为属于( )。

A．犯罪预备

B．犯罪中止

C．犯罪未遂

D．不构成犯罪