Reluctantly after trying appeasement (which was a massive failure) Britain and France had to honor their promise to defend Poland should she be attacked. When she was, Britain and France declared war on Germany.
Answer:
b. False
Explanation:
John promised to pay Bill if he painted the garage by Friday but John called him to cancel the deal before he began to do the task and he didn't even buy the supplies. So, John won't be obligated to pay Bill $100 if he buys the supplies and paints John's garage because John let him know that the deal was off before he had bought anything. According to that, the statement is false.
World War I, which lasted through Jul 28, 1914 to Nov 11, 1918.
https://www.history.com/topics/world-war-i/world-war-i-history
Info at the link