Why did many americans consider the mexican cession to be a success?
it resolved the question of slavery in new territories.
it added new citizens to the us population.
it completed the expansion of the us to the pacific.
it demonstrated the strength of the us military.

It completed the expansion of the US to the Pacific.

Explanation:

The united states wanted to have extension from west to east coasts, and witht he Mexican cession of California and its territory it finally was able to have trading ports in both coasts and be a large continental country.

answer; i believe the correct answer is norming;

to stay where they were until m sent for