You are considering the purchase of a new server that would cost $1.5 million and produce cash flows of $400,000 per year for the first two years, $500,000 per year for the next two years, and $700,000 for the final year of its life. If your required return is 12%, what is the IRR of buying the server?

A. 23.69%

B. 17.85%

C. 11.33%

D. 15.36%