The correct answer is D) Since European goods could not be easily imported during the war, more factories were built in the U.S. to supply Americans with the goods they demanded.
"The War of 1812 was a catalyst for the industry in the United States." The answer that could be used to CORRECTLY support this statement is "Since European goods could not be easily imported during the war, more factories were built in the U.S. to supply Americans with the goods they demanded."
The United States and Great Britain went into war in 1812 due to many factors such as the English wanted to restrict American trade, the desire of the American colonists to explore and expand to new territories, and the English navy impressment of American sailors for being considered deserters of the British Royal navy. With these scenario imports from Britain were restricted and the Americans had to develop their own industry in order to prosper.
The other options of the question were A) U.S. factories began using free labor- rather than slave labor- to produce the goods needed to win the war, B) Businessmen in the United States relied on a flood of immigrant labor to keep their factories running during the war, and C) The U.S. needed to create an army and navy to fight the British, and American industry was able to mobilize the resources of the entire country.