Solve the problem.The inequality 
? 17 describes the range of monthly average temperatures T in degrees Fahrenheit at a City X. (i) Solve the inequality. (ii) If the high and low monthly average temperatures satisfy equality, interpret the inequality.
A. T ? 55; The monthly averages are always less than or equal to 
B. 10 ? T; The monthly averages are always greater than or equal to 
C. 21 ? T ? 55; The monthly averages are always within 
D. 10 ? T ? 66; The monthly averages are always within 
Answer: C
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