单选题 The probability of failure for a project element is often called exposure to risk，or risk exposure．This exposure may be mitigated by taking measure to avoid a particular approach or use of specific technologies．When the risk exposure cannot be reduced through selection of another alternative，the project manager should______．

A、 conduct further studies and analysis until a more attractive alternative is found
B、 disregard the exposure to risk because nothing can be done
C、 not performs the activities with risk exposure and save the money which would have been spent on them
D、 establish a contingency plan to overcome any adverse activitwhich may include a contingency allowance

【正确答案】 D

【答案解析】[解析] 项目要素的失败概率通常被称为风险曝光率。可以通过采取措施避免使用某种特殊方法或特定技术来减少这种曝光率。当不能通过其他方法减少曝光率时，项目经理应该______。 A) 进一步研究直至找到一个更好的替代方法 B) 忽视风险曝光率因为无事可做 C) 不要做和风险曝光率有关的事并保存相关的资金 D) 建立一个应急计划以克服负面影响，包括意外补贴选项D等于采取了积极的接受。