The futility of the program resulted from poor planning.

A．possible failure in the future

B．ineffectiveness and uselessness

C．blindness to its mistakes

D．potential disaster

王某因涉嫌抢劫被某县公安机关刑事拘留。王某感到冤枉以自伤表示抗议。后经公安机关审查属于错抓，王某被无罪释放。（）是王某自伤的侵权主体。

A.县公安机关

B.羁押部门

C.王某

D.办案人员