It's on the article that comes with it. I had that assignment too.
Nothings shown on my side
Answer:
He invoked the Neutrality Act, making sure neither Germany and Japan nor Britain and France, could buy anything from the U.S. When Poland was invaded, though, Congress changed its mind. The Neutrality Act of 1939 again allowed the U.S. to sell war materials to warring nations on a cash and carry basis.
The correct answer should be C. Germany.
This has yet to be proven though because even though he was accused of being financed and collaborating with Germans, many of his party members including him defended themselves as proponents of anti-german-nationalism.