Which of the following was a commonly held reason some americans opposed the war with mexico?

a. american expansion in texas would also restrict the expansion of slavery.

b. there were no valid grounds for declaring war in the first place.

c. texas must be respected as a sovereign nation.

d. americans didn’t want to risk losing land in the conflict.

b)

it created free trade throughout the colonial territories.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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d.

the northwest territory became the most densely populated area in the u.s.

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.