When William the Conqueror invaded England, what became the official language of business in England?

French

Explanation: In 1066 William the Conqueror, the Duke of Normandy (part of modern France), invaded and conquered England. The new conquerors (called the Normans) brought with them a kind of French, which became the language of the Royal Court, and the ruling and business classes.

because you are a boy

explanation:

well basically since ima beginner people will answer any subject "right away"and if you get more points you could ask more questions or if you answer someone's question you get points