Freida Farmer, 78 years young,from Karnak, IL has the winning Powerball lottery numbers which will pay out $7 million at the beginning of each of the next 30 years (reported prize of $210 million).Before claiming her prize, Dependable Insurance Company offers Frieda $100 million today in exchange for her winning lottery ticket and prize payout.What rate of return would Dependable Insurance earn if Frieda accepts their offer?

a.2.50%

b.5.66%

c.4.73%

d.6.22%

e.4.99%