The South East Asia Treaty Organization or SEATO was created in part of the outcome of the Korean War. SEATO is an international organization that aims to have a collective defense. The treaty was signed in Manila, Philippines in September of 1954. The answer would be letter B.
Missouri compromise was a United States federal legislation that stopped northern attempts to forever prohibit slavery expansion by admitting missouri as a slave state.
Because the author can show how characters change (A), but they need to show how the characters acted before the change (C). And B is just what explains the character.
