Which medium ignited what is considered a cultural revolution?

radio

television

print

film

The answer is: print.

Johannes Gutenberg, in the 15th century C.E. introduced the printing press to the Western World, igniting what became a cultural revolution at a decisive turning point in Europe, which, along with other milestones, like the discovery of America by European sailors, propitiated the advent of Modernity which, centered as it was in a new form of knowledge and a conception of the human being as rooted on earthly, philosophical, and scientific foundations (no longer being founded on divine authority), made the propagation of this knowledge more readily available for all people and not only university scholars or clerics.

b. both have yearned to escape the environment they experienced as a child.