The reason why John Brown's speech was so effective after they gave him the death penalty was C.He asks for neither mercy nor forgiveness from his captors.
John Brown was a radical abolitionist who was willing to use violence to gain an end to slavery.
When pro-slavery authorities caught him and gave him the death penalty, he did not plead for mercy but rather accepted death because he believed in his ideals deeply.
Find out more on John Brown at https://brainly.com/question/3644832.
#SPJ1