The US balanced slave and free states by bringing Texas and California at the same time. How effective was this approach in annexing Texas into the United States? How long do you think this balance would last?

Not very effective

Explanation:

Every action taken during the years leading to the Civil War was temporary, as the balance was eventually broken and the South seceded and sparked war.

answer; /// i believe that the correct answer is (divison of labor);

the answer would be cities along the east coast.