When was the firm foundation of quantum theory laid

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．among ordinary consumers who are not technically minded
B．among people who are technically minded
C．among experienced technicians and potential users
D．among people who are in charge of public relations