I believe A, Townshend Act.
The answer is choice C, the superpowers took a step toward peaceful co-existence.
The chinese formed the party
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.