Answer:the existence of slavery
Explanation:
Just answered this
<u>The period in which the greatest economic or technological progress that occurred in the United States was between the end of the 19th century and the first half of the 20th century</u>. <u><em>During this period, the country went from being a simple agricultural economy to the first industrial power in the land</em></u>.
<u>It was in the second half of the nineteenth century when the first manufactures were created with imports of skilled foreign labor from England.</u>
<em><u>The answer is</u></em>: <u>A. Britain supplied a market for American manufactured goods</u>.
Answer:
Hitler signed the Nazi-Soviet Non-Aggression Pact with Stalin in August 1939. Both the Soviet Union and Germany promised not go into war with each other for ten years.
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