Correct answer is B
As per Risk-Value Quadrant (Prioritization Scheme)
Do First – High Value and High Risk
Do Second – High Value and Low Risk
Do Third – Low Value and Low Risk
Avoid – Low Value and High Risk
Main point is high risk items need to be get off as early as possible because they can derail the whole project. If it is of low value we can ignore it. But if it is of high value then it should be done first so that if we fail then atleast we fail early to save time and effort.
Learn Agile Concepts : Agile Concepts
Agile Blog : Agile Blog