Basil has several domino tiles, as shown in the figure. He wants to arrange them in a line according to the well-known "domino rules": in any two tiles that are next to each other, the squares that touch must have the same number of points. What is the largest number of tiles he can arrange in this way?  [insert picccc] 
选项为:A:$$3$$  B:$$4$$  C:$$5$$  D:$$6$$  E:$$7$$  请回答其中一个选项.