单项选择题
In New York, Manhattan Streets and Avenues are arranged in grid fashion. In the new town of "Grid", they copied the New York system. Eleven friends who all lived in street-corner dwellings, arranged to meet for lunch. On which street-corner should they meet, to give the least amount of total walking distance()

A.Avenue 4, Street 2.
B.Avenue 4, Street 3.
C.Avenue 4, Street 4.
D.Avenue 4, Street 5.