Please help does anyone know this i’ll give brainlist

The answer is A.

Explanation:

I choosed A because of the cotton gin. Slavery was booming in the 1800s and with the creation of the cotton gin. Cotton could be cleaned more quickly. This revolutionized the cotton industry. Now, I am unsure about the sewing machine though.

frederick the great and the war of austrian succession. frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. he also declared himself king of bohemia, and maria theresa sent troops to retake bohemia. in august he led 80,000 of these men across the frontier into bohemia, his

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.