At the beginning of the investigation
I believe the last option is the correct one - <span>They were opposed to Article 10 that could infringe upon the United States’ right to declare war and expand its territories.
This particular Article meant that anyone could call America for assistance in times of war. Obviously, the US politicians were against such a decision, even though France and Britain wanted to sign it. In the end, nothing happened with this document.
</span>
The Enforcement Act of 1869, also known as the Civil Rights Act of 1870 or First Ku Klux Klan Act, or Force Act