What Does Max Weber Mean When He Says That Modern

What does Max Weber mean when he says that modern people are trapped in an "iron cage"?

A) Most aspects of life are increasingly controlled through rigid rules and rationalization.
B) Increasingly, we live and work in smaller and smaller physical locations, as if crammed in a cage.
C) More and more people live under totalitarian dictators and so lose basic rights and freedoms.
D) Increasingly, modern society has more laws and uses them to incarcerate more people in prison.
E) The conditions of modern life create a psychic prison that leaves most people discontent with civilization.