Can ou help me please

F: The revolutionary war. This is the only answer that dates this close to the date provided in the question (1850). It can't be the war of 1812, because that is way earlier than 1850. The U.S.-American war was in like 1830 something, and it can't be the civil war, because that was closer to the 1900's. So the only answer left that is even remotely close to 1850 is the revolutionary war.

the right answer is the third one: turnpikes went short distances to connect markets. turnpikes, also known as toll roads, were very important for trade and transportation (of people, goods and products) in the 19th century, coinciding with the expansion towards the west. they contributed significantly to the economic development of the united states.

spread of christianity