Answer:
B: Some northern states used personal liberty laws to nullify the Fugitive Slave Act, written to help the South.
Step-by-step explanation:
The Fugitive Slave Laws were one of the most controversial laws of the 19th century, it was passed in 1793 and permitted local governments to seize and return escaped slaves to their owners even if they were in the Northern States that were slave-free states. These laws prompted the northern states to pass the Personal Liberty Laws that provided for the right to a trial by jury for accused free slaves.