Which of the following describes an accurate reaction by a Western democracy to aggression perpetrated by democratic nation during the 1920s or 1930s?
a) Both the US and Britain ordered airstrikes on Moscow after Stalin's invasion of Finland
b) Britain conducted airstrikes to prevent the German annexation of the Sudetenland
c) France sent military contingents to Italy to prevent Mussolini from seizing the island of Corfu
d) The US imposed a trade embargo on Japan after Japan's military invaded and occupied Chinese Manchuria