What Happened in Christiana,Pennsylvania,in 1851

What happened in Christiana,Pennsylvania,in 1851?

A) Abolitionist Theodore Parker defied the Fugitive Slave Act by helping two slaves escape to freedom.
B) About twenty African Americans fought a gun battle with slave catchers,killing two;a jury subsequently acquitted one defendant,and the government dropped charges against the rest.
C) Rioters marched into a courthouse,forced their way into the courtroom,and freed a fugitive slave facing trial.
D) Frederick Douglass declared that "the only way to make a Fugitive Slave Law a dead letter is to make a half dozen or more dead kidnappers."