The Hart-Celler Act created immigration guidelines that gave preferred status to skilled workers and immigrants with families in the US. Option B is correct.
The Hart-Celler Act, also known as the Immigration and Nationality Act of 1965 constituted a federal law that the 89th United States Congress passed and which was signed into law by President Lyndon B. Johnson which abolished the National Origins Formula.
The Hart–Celler Act amended the Immigration and Nationality Act of 1952.