Your College Campus Has Designed an Underground Tumnel System to Connect

Multiple Choice

Your college campus has designed an underground tumnel system to connect five of the main buildings on campus. A map of the underground system is shown below. Suppose that you start in Meconi Hall, end in The Glasgow Center, and plan to travel through each and every tunnel, what is the fewest number of tunnels that you would need to travel through more than once in order to accomplish this task?

A) 0
B) 1
C) 2
D) 3
E) None of the above.