次の文章（問14の続き）を読み、（　）に入れるのに最も適切な、まとめの文を選びなさい。3点

      In zone A of the beach, the customers go to George, and in zone B they go to Georgina.  This is good for the customers, because nobody needs to walk more than 1,300 feet for some ice-cream.  

      But George isn't happy---he only has 50％ of the customers that he had before.  So, he goes back to the middle of the beach.

     Zone A is now bigger than zone B, and George has more customers and makes more money, but some of his customers need to walk 2,600 feet to get their ice-cream.  

     Of course, Geogina sees what George has done, and now she isn't happy---she's going to lose money.  So, she moves to the middle of the beach, too, and gets 50 % of the customers again.

     The result is this:

  -George and Georgina end up next to each other.

 -They both get 50 % of the customers.

 -More customers need to walk further for some ice-cream.

So, (            ).   

　これが文章の終わりです。