According to the passage which of the following

According to the passage, which of the following is not true？

A．Galileo did not solve the problem of the water-pump.

B．When a scientist tries to establish a scientific law, he must collect much information.

C．An original hypothesis is not always accepted.

D．Using a good vacuum pump, it is possible to raise water from the bottom of a building to the roof 50 feet above.

请帮忙给出正确答案和分析，谢谢！