The right answer is "B.) For a man of integrity to be executed while slave owners run free is an absurd notion."
Reductio ad absurdum (Latin for "reduction to the absurd"), is a kind of logical argument in which one assumes one or more hypotheses and, from these, derives an absurd or ridiculous consequence. This can be seen in the above, where it is absurd for a man of integrity to be executed while the slave owners run free.