The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what times was the temperature below 77°F?
A. after 3 p.m.
B. from 12 p.m. until 3 p.m
C. from 9 a.m. until 12 p.m. and from 3 p.m. until 6 p.m.
D. from 9 a.m. until 11 a.m. and from 3 p.m. until 6 p.m.
Answer: D
Mathematics
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A. 
B. 
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.
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