Article iv of the constitution, which includes the full faith and credit clause, ensures that:
a. all citizens are guaranteed the right to vote.
b. the process of amending the constitution remains clear.
c. laws passed in one state are honored by other states.
d. the president is prevented from gaining too much power.

The correct answer is c.laws passed in one state are honored by other states.

This is done to prevent states having feuds with one another and to prevent a civil war or anything similar. This applies to laws unique to the state since federal laws are the same for all states. This for example is the right to have a death penalty. Other states have to honor the fact that there's such a law and can't bother the state about it since it's not something found in a federal law.

Try a? sorry if i’m wrong