Which of the following statements regarding real options is not correct? a) real options should only be exercised when they increase the npv of a project. b) real options give owners the right, but not the obligation, to exercise these opportunities at a later date. c) real options build greater flexibility into a project and thus increase its net present value (npv).d) real options enhance the forecast of a project's expected future cash flows by incorporating, at the start of the project, the effect of decisions that will be made at a later date.