Final answer:
The change in temperature from 7 P.M. at 5°F to midnight at -7°F is a decrease of 12°F, calculated by subtracting the evening temperature from the midnight temperature.
Step-by-step explanation:
The change in temperature from 7 P.M. to midnight can be determined by subtracting the evening temperature from the midnight temperature. At 7 P.M., it was 5°F and at midnight, it dropped to -7°F.
To find the change, calculate the difference as follows:
Change in temperature = Midnight temperature - Evening temperature
Change in temperature = (-7°F) - (5°F) = -12°F
Therefore, the temperature change was -12°F, which is option C.