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 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.

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explanation:

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.