Which one of the following statements is INCORRECT? Select one: a. In assessing stand alone risk, scenario analysis technique provides a focused change on one single variable such as sales volume, sales price, etc. O b. Scenario analysis technique provides a range of possible outcomes for the assessment of stand alone risk. O c. In assessing stand alone risk via scenario analysis, it concentrates on simultaneous change in many variables. For example, scenario analysis is useful to know what would happen to the project's NPV if many input variables turn out to be better or worse than expected for possible situations: worst case, most likely case, and best case.