Answer:
A. A charter
Explanation:
A charter is like a document signed by the king to establish land
A conversion is changing something like changing religion and all that stuff
A mission is a quest or adventure that you need to complete things like that.
A religion is something you warship.
All immigrants coming into the US had to stop at ether of those places to be allowed into the US
People such as John Locke, (who the colonists looked up into his writing), believed that people were born with natural rights, such as life, liberty, and property. The colonists in America believed similar, and got inspiration from what John Locke wrote in a book.