题目内容：
根据以下内容回答题：An interesting theory in e。conomics is demonstrated by the Head Man of a small mountain tribe．It seems that this tribe was very good(1)straw mats that had great sales potential in the world market．The representative of an American company went to visit the tribe and tried to(2)a good business deal．He said to the Head Man and declared that his company would like(3)several thousand pieces．Undoubtedly，he said，the business deal would be profi-table to the tribe．After some thought，the Head Man(4)，but announced that the price per piece would be higher’on(5)order than it would be if only a_small order(6)placed．
The representative was more than a little shocked(7)the business sense of the Head Man and insisted that the price should be lower because of the large volume，and(8)not higher．“No，”replied the head of the tribe stubbornly．“But(9)not?”asked the Ameri-can．“Because it is so tiresome to make(10)article over and over，"answered the Head Man．
请回答(1)题 A．at making
B．to make
C．for making
D．in making
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