Question

the creation of the second national bank of the united states was instrumental in limiting the power of a congress. b democrats. c state banks. d state legislatures.

Explanation:

The Second National Bank of the United States was involved in curtailing the power of state banks. State banks had grown in influence, and the Second National Bank aimed to regulate and reduce their unchecked power, especially in issues like issuing banknotes and financial operations. Congress created the bank, but the bank's role was more about limiting state banks' power than Congress, Democrats, or state legislatures in this context.

Answer:

C. state banks.