When is the heavy traffic hour on most city streets according to the passage

[A] During 9:00 a.m. and 5:00 p.m. from Monday to Friday.
B. Between 8:00 a.m. and 6:00 p.m. from Monday to Friday.
C. In the period of 9:00 a.m. and 5:00 p.m. every day.