The correct answer is D) The US loaned over $2 billion to the Allies, while Germany was only loaned a few million.
The purpose of being neutral is to not show favoritism towards any countries involved in a war. This is supposed to help a specific country, in this case the US, to avoid getting involved in the war. However, the US clearly shows that they favor the Allied powers during this war, as they give the Allied powers significantly more money than the Central powers.