What are some obstacles that would arise if different sates had different currencies? Please help me ASAP thanks

If different states had different currencies, things would be more or less expensive, making it difficult to have a stable economy.

Explanation:

If they were to have different currencies were to be different, you could only know how much money a certain state has because it's different.

the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.