In the morning, the temperature was $-3^{\circ} \mathrm{C}$. In the afternoon, the temperature was $5^{\circ} \mathrm{C}$. By how many degrees Celsius did the temperature increase?
(A) 8
(B) 3
(C) 5
(D) 2
(E) 7
The increase in temperature equals the warmer afternoon temperature minus the colder morning temperature.

The difference between 5 and -3 is $5-(-3)=5+3=8$.

The temperature increased by $8^{\circ} \mathrm{C}$.

ANSWER: (A)