The project D. Building the Transcontinental I believe is the one that led to the creation of a system of time zones across America
The correct answer for this question is this one:
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1. The Japanese air force attacks the US army base at Pearl Harbor.
</span>2. The United States agrees to trade old destroyers for military bases in British territory.
3. The cash-and-carry policy allows the sale of arms to nations at war but only for cash.<span>
4. The United States declares war on Japan.
5. The Lend-Lease Act allows Britain to buy arms from the United States on credit.
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Hope this helps answer your question and have a nice day ahead.
