Wayne enterprises is considered investing in two projects. The first project is the tumbler project which is expected to cost $50 million and will result in cash flows of $60 million, $90 million, and $20 million at the end of 1st, 2nd, and 3rd year. The second project is the Bat project which is expected to cost $80 million, and will result in cash flows of $10 million at the end of 1st year, zero at 2nd year, but it is expected to generate economic benefits of $250 million at the end of 3rd year. Find the crossover rate.

a. 19.457%

b. 17.685%

c. 18.784%

d. 23.908%

e. 21.781%