Which was not a challenged faced by america during the start of the wwi?

Establishing boarders with Canada and Mexico.

Explanation:

According to a different source, these are the options that come with this question:

Establishing boarders with Canada and Mexico. Recovering from economic problems. Building economic ties to Latin America. Trading with member of both the Allied and Central powers.

Establishing borders with Canada and Mexico was not a concern of the United States at the start of World War I. The borders between these countries had mostly been established by 1914, and they were not subjects that were connected to the war. However, recovery from economic problems, building ties with Latin American and trading with various countries were also significant concerns for the United States during this time period.

establishing boarders with Canada and Mexico

Explanation:

World War I began in 1914 and it was caused by the outright killing of Archduke Franz Ferdinand (the heir presumptive to the throne of Austria-Hungary) and the war lasted for four years. During the war, Germany, Austria-Hungary, Bulgaria and the Ottoman Empire took side and fought against the likes of Great Britain, France, Russia, Italy, Romania, Japan and the United States.

The involvement of the US in the war challenged them greatly and one of the things they went away with was the establishment of boarders with Canada and Mexico.