Answer:
C) one example of a group of free blacks who mobilized to protect fugitive slaves.
Step-by-step explanation:
The Christiana Riot happened when and expedition of white people tried to re-capture some escaped slaves in the city of Christiana, Pennsylvania, which was a ressitance of free black men against the re-capture of 4 blacks that escaped slavery and after the congress passed a law where all escaped slaves should be returned to their owner and was a violent series of ressistance and eneded up on almost 40 people wounded or assasinated.