In 2012, Northland Had Real GDP of $4

In 2012, Northland had real GDP of $4.21 billion and a population of 2.98 million. In 2013, real GDP was $4.59 billion and population was 2.97 million. What was Northland's growth rate of real GDP in 2013?

A) 0.38 percent
B) 3.8 percent
C) 8.3 percent
D) 9.0 percent
E) 11.1 percent