In 1917, Germany, determined to win its war of attrition against the Allies, announced the resumption of unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American liner Housatonic was sunk by a German U-boat.
Answer:
I think the right answer is c
<span>Don't worry I got you. The Qing Rule was known as a rule of both Peace and Prosperity. Hope I helped</span>
