By 1787 all state constitutions
a: established an official church
b: expanded suffrage to include free african americans.
c: created a limited government.
d: gave voting rights to free african americans and white women

C- Created a limited government is the answer. You don't need to directly know this, rather, process of elimination.

A- Establishing a state church is prohibited by the Constitution of the U.S - Seperation of church and state.

B. Free African Americans did not  have the right to vote in every state, although, those that owned property could in New Hampshire, New York, Massachusetts, North Carolina, and New Jersey.

D- African Americans did not earn the right to vote universally into after the Civil War(and even then Jim Crow laws made it difficult) and Women did not earn the universal right to vote into the 19th amendment in 1920.