Why do we humans have to constantly improve our work tools?

The system of checks and balances ensures that

Which statement best completes the diagram related to the supreme court’s procedures? a. a party in a lower-court case requests that the supreme court overturn the other court’s ruling in the case. b. federal judges nominate a small number of cases to be overturned by the supreme court. c. congress votes on which court cases should be reviewed by the supreme court. d. the president selects court cases involving new laws for the supreme court to review

Why caused john quincy adams to write the monroe doctrine?