Where does this article probably occur

A．Quantum mechanics and uncertainty relations do not have obvious relationship.
B．Quantum theory, which contributes greatly to human beings, developed perfectly.
C．Quantum theory changed physics as well as the whole world picture.
D．Uncertainty principle is as great as Einstein’s concept of relativity.

A．He and his family all didn’t know how to use the machine.
B．His family supported his opinion.
C．Many people faced the trouble as he did.
D．He was a popular guy.