NPC has the opportunity to invest in a project that has a 75% chance of generating $500 per year for 7-years under good conditions or a 25% chance of generating $25 per year for 7-years. Assuming that all cash flows are discounted at 10%, calculate the effect of waiting on the project's risk, using the same data. By how much will delaying reduce the project's coefficient of variation? (Hint: Use the expected NPV.)

A:2.23

B:2.46

C:2.70

D:2.97

E:3.27