$1\mathrm{.}10.$ The difference between sensitivity analysis and scenario analysis is

A$.$ sensitivity analysis is a method for evaluating risk while scenario analysis is not.

B$.$ sensitivity analysis is based on regression analysis while scenario analysis is not.

C$.$ sensitivity analysis examines the impact on the overall results of a change in one variable while scenario analysis examines the impacts on overall results of changes in several variables at the same time.

D$.$ sensitivity analysis and scenario analysis have no differences at all.