Answer: A bill of rights
Explanation:
George Mason was a delegate for Virginia during the Constitutional Convention of 1787 which had gathered to create a new Constitution for the young American state.
He came to the convention opposed to the creation of a strong Federal Government and a desire to protect the rights of citizens in the new state. He pressured the delegates to include the Bill of Rights in the Constitution which are also known as the first 10 Amendments to the Constitution.
