Two mutually exclusive investment opportunities require an initial investment of $$7$ million. Investment A then generates $$1\mathrm{.}90$ million per year in perpetuity, while investment B pays $$1\mathrm{.}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?

A$.6\%$

B$.12\%$

C$.3\%$

D$.13\%$