The correct answer is “Chamberlain opposed going to war with Germany at all costs, while Churchill believed that action was needed to stop German aggression”.
You can see Churchill’s opinion clearly because he heavily criticized the “Munich Pact”. Chamberlain thought that Germany would follow the deal and would not invade Czechoslovakia, this did not happen and Germany invaded the rest of the country in 1939, which proved the Pact did not prevail and Churchill was correct. Churchill’s opinion was that they should act to stop Germany before it was too late and that delay the war would bring even more chaos.