The correct answer is b)
The EU started as an association of countries that seeked economic improvement by boosting their import and export. They signed a series of treated to create three overlapping organizations, one of them being the European Economic Community (the other specified unified Atomic Energy market and the third unified Steel and Carbon Market). These treaties later developed into the modern EU.
The person in question is Woodrow Wilson:
He was the president of the United States from 1913 to 1921, which means that he was the president before, during and after the First World War.
He was very active in the peace process after the war, including proposing the formation of the League of Nations.
External criticism is very important when it comes to analyzing data, because as a researcher it is possible to get too "close" to the data, in that one can stop being objective and start looking for ways to match the data to the desired results.
I believe the answer would be D (all of the above).
For the full article, see Delian League. Delian League , Confederacy of ancient Greek states led by Athens and based on the island of Delos. Founded in 478 bc to combat Persia, its members included Aegean states and islands; Athens supplied commanders and assessed tributes of ships or money.