请教关于场景恢复的一道题

topor

题目：
Listed below are four scrreens that represent application events ,which of the following triigger evernts would you not consider for a recovery scenario?
a.An applicaiton failure.
b.A pop up window with an error message
c.An optional step in a business rpocess
d.A run error.

请老师给出答案和解释，谢谢！

grass2006

答案应该是c，看看help文档就很清楚啦。呵呵，我比较懒，有好久没学习啦