In 2012, the imaginary nation of Dorados had a population of 8,000 and real GDP of 3,000,000. During the year its real GDP per capita grew by about 2.9%. Which of the following sets of growth rates is consistent with this growth?
选项：

A:2% population growth and 6% real GDP growth;
B:6% population growth and 2% real GDP growth;
C: 4% population growth and 7% real GDP growth;
D: 7% population growth and 4% real GDP growth