Where did the concept of feedback come from？

A.It was invented by Confucius.

B.It was invented by Aristotle.

C.It was invented in World War 2 while working on anti aircraft guns.

D.It was invented to catch fish.

E.It was invented very recently in Alibaba'；s research centre.

正确答案：It was invented in World War 2 while working on anti aircraft guns.