Real GDP Per Person in Richland Is $20,000,while Real GDP

Real GDP per person in Richland is $20,000,while real GDP per person in Poorland is $10,000.However,Richland's real GDP per person is growing at 1% per year and Poorland's is growing at 2% per year.After 50 years,real GDP per person in Richland minus real GDP in Poorland is

A) still $10,000.
B) greater than $10,000.
C) positive,but less than $10,000
D) zero.
E) negativE.