Which principle grants the president the authority to appoint federal judges?
a. judicial review
c. federalism
b. popular sovereignty
d. checks and balances

The principle of check and balances grants the president the authority to appoint federal judges.

Check and balances, principle of government under which separate branches are empowered to prevent actions by other branches and are induced to share power. Check and balances are primarily applied in constitutional government and are fundamentally important in tripartite governments like the United States of America. The separate branches of the United States are executive, legislative, and judicial.