D.
The rest seem wrong.
It could be B though
<span>Mixed market economies focus on preserving as much freedom to make economic choices as possible. Governments in these economies have limited involvement in managing and regulating the economy. In contrast, command economies are focused most on preserving and requiring equal opportunities, which means governments that greatly regulate the economy. More economic systems are geared toward offering producers and consumers the freedom to make economic choices, so mixed market economies are more common in the world today.</span>
The United States viewed World War I as a "European War" and did not think that it had anything to do with them. Woodrow Wilson declared neutrality in the war in 1914. In 1917, the United States entered the war when Germany announced its "resumption of unrestricted warfare in war zone waters."
