Emerald Energy is an oil exploration and production company that trades on the London stock market. Over the past year, the stock has gone from 50 per share to 55, but over the same period, the dollar has depreciated ten percent. Calculate the investor's annual percentage rate of return in terms of the U.S. dollars.

a)3.5%

b)22.22%

c)0%

d) There is not enough information to compute the investors annual percentage rate of return in terms of the US dollars