The correct answer is actually industrious or inferior. That's why when they group up there is often a clear hierarchy among the children as to who will be the leader and who will be the follower in things like various games or sports activities.
As far as I know, it was the Chinese - there is evidence they had movable printing press as early as in 12th century.
In Europe the movable print was devised by Johannes Gutenberg in Germany, Mainz.
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