Tina was flying to Atlanta from New York. The temperature in Atlanta when the plane landed in the morning was 72°. By the afternoon the temperature had risen 21°. When Tina went to sleep, the temperature had dropped 11°, and the temperature remained the same until the next morning. That morning, Tina flew back to New York where the temperature was 67°. What was the change in temperature from when Tina left Atlanta and arrived in New York?

A
5°
B
6°
C
14°
D
15°