Sameer drove to interview for a new job and returned home in one day. Sameer’s Trip to a Job Interview

On a coordinate plane, the x-axis is labeled Time (hours) and the y-axis is labeled Distance (miles). A line connects points (0, 0), (3, 180), (5, 180) and (7, 120).

How many hours after he left his house is it most likely that Sameer first hit traffic and had to slow down?
A. 3
B. 5
C. 7
D. 9