Sensitivity analysis is conducted by:

a$.$

managers after a project has been implemented to determine how every variable relates to the level of output realized.

b$.$

changing the value of a single variable and computing the resulting change in the net present value of a project.

c$.$

holding all variables at their base level and changing the required rate of return assigned to a project.

d$.$

assigning either the best or the worst possible value to each variable and comparing the results to those achieved by the base case.