I don’t really understand your question
Answer:
During the 1920s, Congress supported domestic producers with a protective trade policy.
Explanation:
We can infer from the information in the question that during the 1920s, and even in 1930, Congress passed several laws that aimed at protecting American domestic producers from foreign competition.
These protectionist laws were the tariffs that are listed in the question. A tariff is simply a tax on foreign goods, and are the most commonly used protectionist policy.
The 3 significant causes to World War 1 would be:1. Treaty of Versailies, which forces Germans into accepting Full Blame for WWI. 2.This caused Germany to lose a lot of its lands. 3. Forced them to pay restitution for war dameges to countries like France, and Great Britain ect. 4. (just for the info) This made their leader very angry and it started a whole new perspective upon the nations view point.