Why did the government wanted to eliminate American Indian languages and cultures?

It was thought that inner communications would threaten government overthrowing and taking back of land. As well, when you weaken a group of people and oppress them, they can become easily scared and subservient as a result of their fear. If they cannot speak their own language any longer, they are forced to assimilate into the society your country is wanting, and disconnects them from the land and ancestors, forgetting the reasons they should fight to keep their connections and languages.  Unity can become forgotten in times of turmoil, furthering the point many will be scared and unwilling to fight without many allies.

b. 155 enlisted men and no officers

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.