Which of the following is not a concurrent power shared by the federal and state governments? a. the power to levy taxes c. the power to sign treaties b. the power to borrow money d. the power to maintain a court system

The answer is letter C.

The power to sign treaties is not a shared power by the federal and state governments. It is mostly the responsibility of the legislative and executive departments of the US government. Treaties are conditions that have been voted upon the majority of the legislative department that still needs to approved by the executive part of government.

Other decisions like levying taxes, borrowing money, and maintaining a court systems are powers both shared by the federal and state governments.