Pls help. Medium of exchange are helpful for societies because they:

Iwill be giving 15 points to whoever answers the concept of checks and balances means that each branch of governmenta. has its own powers and responsibilitiesb. is clearly described in articles of the constitutionc. has the ability to correct the other branches in case of an errord. is set up so that in case of constitutional crisis, the governement will continue to operate

President eisenhowers foreign policy stressed peace, threatened massive retaliation for attacks and what

Why did metternich think nationalism threatened the austrian empire?