I would say this would be A..not sure though.
Christopher Columbus sailed the ocean blue in 1492. He established the world.
The correct answer is the Hanseatic League.
The Hanseatic League was formed in the 1100s and existed as a confederation of merchant towns in modern-day Germany until the late 15th-century.
The Hanseatic League can be seen as a modern precursor to the European Union, that is, a confederation of economic interests that work to provide mutual benefit.