Two mutually exclusive investment opportunities require an initial investment of $6 million. Investment A then generates $1.60 million per year in perpetuity, while investment B pays $1.10 million in the first year, with cash flows increasing by 5% per year after that. At what cost of capital would an investor regard both opportunities as being equivalent? O A. 16% O B. 18% O C. 8% OD. 4%