How Does Peer Review Influence the Development of Scientific Theories

How does peer review influence the development of scientific theories?

A) Peer review allows other scientists to know what is current in their field.
B) Careful evaluation of research results by other scientists ensures that only solid and legitimate research results are published, and helps prevent faulty research or false claims from being viewed as scientific fact.
C) Peer review increases competition among scientists and thus increases the quality of the published work.
D) Peer review makes it extremely difficult for work to be published other than earth-shattering scientific theories.