This passage might be subtracted from

A．a solar eclipse confirming Einstein's original predictions and general theories
B．more young theorists finishing their experimental check on their ideas
C．many problems of the twentieth century needed dealing with
D．nothing unknown to everyone due to the endeavors of those theorists

A．would spend the whole life in the United States
B．mostly graduated from the U.S. institutes of technology
C．all choose the physics as their favorite major
D．wonder the way in which their theories are tested