The Latitude of Washington, D

Multiple Choice

The latitude of Washington, D.C., is 39°N. The latitude of Boston, Massachusetts, is 42°N. If the only difference in their temperature regimes is connected to their latitude difference, about how much warmer should Washington, D.C. be compared to Boston?

A) 1.2°C
B) 2.4°C
C) 3°C
D) 4.2°C
E) 12°C