What reason did senators give for opposing U. S. membership in the League of Nations?

a. It would lead to international instability.

b. It would drag the United States into European conflicts.

c. It would drain American finances.

d. It would interfere with free-trade agreements.

The answer is: It would drag the United States into European conflicts. This is the reason that the senators give for opposing the United States membership in the league of Nations. They were also afraid that they'll an organization that would possibly involve the US into European politics again. They're also thinking of what had happened during the World War 2 which they don't want to get involved.