A response to negative risk event is known as a:

I would opt for

C. workaround

as a       .....     C. Workaround

Ans >>>>>>>>>>>>>>>>> D. Work breakdown structure  

work around. 

Work around is the devised response for occurrence of  negative events. unlike contingency plans its a reactive response planning rather than proactive as in contingency planning. More, it is designed solely to bypass, not correct, the problem at hand it should not be expected to survive long past the initial discovery of the problem.

Option (c) is correct answer.

The correct answer is (c) Workaround. workarounds are reaponses to problem that develop while project is being worked, they are never planned, as problems being addressed were never anticipated.