This Year, Real GDP Per Person in Country a Is

This year, real GDP per person in Country A is eight times real GDP per person in Country B. If country B's real GDP per person grows at a rate of 5 percent, about how many years will it take for country B to reach the level of real GDP per person in Country A in this year?

A) 56 years
B) 28 years
C) 14 years
D) 42 years
E) It will never reach Country A's level of GDP per person.