Which of These Represents the Political Linkage Level in the Discussion

Which of these represents the political linkage level in the discussion about paying out-of-state tuition?

A) Voters in each state insist on access for their children and the children of their neighbors to low-cost public higher education.
B) The states are mainly responsible for education in our federal system.
C) The Supreme Court decides that different tuition rates for in-state and out-of-state residents do not violate the "privileges and immunities" section of the Constitution.
D) Elected leaders are not subject to political pressure to change tuition policy.
E) State legislatures decline to pass uniform tuition legislation.