问题详情

You might think the largest library in the world would be in Europe. But it isn"t. It"s in Washington [email protected]@It"s called the Library of Congress(国会).
President John Adams started the library in 1800 for members of Congress. He wanted them to be able to read books about law. The first 740 books were bought in England. They were simply set up in the room where Congress met. Then Thomas Jefferson sold Congress many of his own books. He felt Congress should have books on all subjects, not just on law. This idea changed the library forever.
The library is a huge storehouse. Thomas Edison"s first movie and Houkini"s magic(魔术) books as well as many pictures, movies, globes and machines are preserved (保存)there. And it is the proud owner of the world"s best collection of humorous(幽默)books. Experts(专家)in every field work there. Hundreds of people call every day with all kinds of questions. Many of them get answers right over phone.
The first step in starting the Library of Congress was ______.
A．buying Thomas Jefferson"s books
B．buying books from England
C．putting up the library building
D．asking experts in every field to work there请帮忙给出正确答案和分析，谢谢！