On a winter morning, the temperature before sunrise was - 11°F. The temperature then rose an average of 12
degree each hour for 7 hours before dropping an average of 214
degrees each hour for 3 hours. What was the temperature, in degrees Farenheit, after 10 hours?
A:-1 1/4
B:-10 1/4
C:-14 1/4
D:-21 1/4
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