Last Monday, the temperature at 3 a.m. in a North Dakota town was −27°C. At 3 p.m., the temperature was −15°C. Which of the following is true about the temperature change between 3 a.m. and 3 p.m.?

A.
The temperature rose by 42°C.
B.
The temperature rose by 12°C.
C.
The temperature rose by −12°C.
D.
The temperature rose by −42°C.