At 2\:p.m., Sanjay measures the temperature to be 3^\circ C. He measures the temperature every hour after this until 10\:p.m. He plots the temperatures that he measures on the graph shown. At what time after 2\:p.m. does he again measure a temperature of 3^\circ C?
Answer Choices
A. 9\:p.m.
B. 5\:p.m.
C. 8\:p.m.
D. 10\:p.m.
E. 7\:p.m.