Jim has been looking for his dictionary for almost an hour, and Tracy forgot to tell him that David

________it ________2 hours ago.[ ]

A. took; away  

B. took; in

C. took; over  

D. took; on

由个人行为引起，且只与特定的个人或部门相关，而不影响整个团体和社会的风险属于 ( )。

A．纯粹风险

B．信用风险

C．投机风险

D．特定风险