阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。
One day, a lady bought some bath soaps from a shop. When she opened one of the packets, she found that it had no soap; it was just an empty wrapper! She made a 1 against the factory and got her money back with a successful claim. That being 2, there was a task before the management of the soap factory. How had this happened? How could they3 that the incident would not occur again?
After a detailed 4, it was discovered that during the 5 of wrapping, it so6 that one or two wrappers did get through without any soap in them! There was no way to 7 the difference between a full wrapper and an empty one. The process of handling each one separately for this purpose seemed to be very difficult. So, the technical 8 was given the job of finding a method to 9 the problem. The man prepared a detailed report and suggested setting up a computer-based system that would weigh and scan each bar, for the empty packs could not be 10 by a normal x-ray machine.
The management heard him out and passed the 11 to release some money to buy the new machinery that he had asked for . An 12 worker said, “Excuse me, Sir, 13 my rudeness, but I have a 14 that will cost a tiny amount of what you are planning to spend.”
The management 15 in the beginning. But 16, they heard him out and agreed to try out his suggestion. The next day, the worker brought a strong industrial fan. He put it at an angle near the 17 belt, on which the packed soap bars were coming through, and 18it on. The few empty wrappers that came through got 19 by the fan! A simple solution for a 20 problem!
This proves that the educated do not have a patent on good ideas.
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