Final answer:
The Kellogg-Briand Pact was an international treaty that outlawed war as a national policy (A), signed by over 60 countries to promote peace, but lacked enforcement mechanisms, making it ineffective in preventing future wars.
Step-by-step explanation:
The Kellogg-Briand Pact
The Kellogg-Briand Pact, named after U.S. Secretary of State Frank Kellogg and French Foreign Minister Aristide Briand, was a 1928 international treaty that aimed to renounce war as a tool for foreign policy. More than sixty countries eventually signed the treaty, which declared war an international crime. While many nations came on board with optimistic hope for peace, the Pact had a significant flaw: it lacked enforcement mechanisms. Consequently, there was no way to hold signatory nations accountable for abiding by its terms, which made it ineffective in preventing the aggressive military policies that led up to World War II.
The correct answer to the student's question of what occurred under the Kellogg-Briand Pact is A) War was outlawed as national policy. Despite the high aspirations and widespread support, the treaty's inability to enforce its provisions rendered it largely symbolic in the lead-up to the global conflicts that followed in the next decade.