Answer:
The correct statement is:
At midnight, the temperature was 20.4 degrees above 0, and in the morning, it was 5.2 degrees below 0.
Explanation:
20.4°F > 0°F > -5.2°F
At midnight,20.4°F means temperature was above 0°F.
And in the morning temperature of 5.2°F was lower than 0°F.This thing is indicated by negative sign.