Which of the following acts by the United States Senate would be constitutionally IMPROPER?
The Senate decides, with the House of Representatives, that a disputed state ratification of a proposed constitutional amendment is valid.  The Senate determines the eligibility of a person to serve as a senator. The Senate appoints a commission to adjudicate finally a boundary dispute between two states. The Senate passes a resolution calling on the President to pursue a certain foreign policy.
Question: Which of the following acts by the United States Senate would be constitutionally IMPROPER?
A. The Senate decides, with the House of Representatives, that a disputed state ratification of a proposed constitutional amendment is valid. 
B. The Senate determines the eligibility of a person to serve as a senator.
C. The Senate appoints a commission to adjudicate finally a boundary dispute between two states.
D. The Senate passes a resolution calling on the President to pursue a certain foreign policy.
Answer: