The answer would be option A "the Bessemer Process." The Bessemer Process was the first inexpensive process to help production of steel and iron before further revolutionizing inventions. The impact of the Bessemer Process was beyond imaginable and it changed the steel industry and a very big way. The Bessemer Process was created back in 1856.
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Answer:
<h2>Treaty of Guadalupe Hidalgo
</h2>
Explanation:
Treaty of Guadalupe Hidalgo, (Feb. 2, 1848), treaty between the United States and Mexico that ended the Mexican War. It was signed at Villa de Guadalupe Hidalgo, which is a northern neighborhood of Mexico City.
<h2>hope it helps please mark me as brlilliant!</h2>
I believe it was isolationism. meaning the usa dud not want to get involved
