Which of the following political groups had its efforts to find a compromise over slavery effectively ended by taney's decision in the dred scott case?

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

Other in the u. s. supreme court, all federal courts were established bya. the constitutionb. congressc. presidential executive orderd. the states

What was true about the progressive movement?