Which of the following required all states to return fugitive slaves to their owners?
a) the great compromise
b) the connecticut compromise
c) the three-fifths compromise

You must be missing an option, since it was none of these that required all states to return fugitive slaves to their owners. Instead, the proper answer would be the "Fugitive Slave Act" of 1850.

Its is d. because i did it

The answer is d. john marshall