The weather forecast states that the temperature will be lower than - 7°F tonight. Let t represent the temperature in degrees Fahrenheit.
Which inequality models this situation?
A. t < - 7 and t must be a negative number
B. t < - 7 and t must be a positive number
C. t > 07 and t may be a negative number
D. t > - 7 and t must be a positive number
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