The key purpose of William's A Key was to
1. Provide a dictionary of the Narragansett language.
2. Provide insight into Native American culture.
A key to language of America was a book which was written by williams's A. Key in the year 1643. There were religious arguments which later characterized his writings.
In his book he explained the phrases which are used by Indians.
The intended audience of William's were potential settlers who were in England and settlers who were in the New England.
I would say that the correct option is D Barons. This is because they were nobles who were taxed by King John in order to use the money for the war with France. As a consequence of this war, he was forced to sign the Magna Carta.
As regards Farmers and Peasants, they were not taxed because they lacked resources and money. And the Parliament did not exist at this point in history.