Question

how did john brown contribute to the bleeding kansas conflict? by ratifying the kansas-nebraska act by aiding the town of lawrence, ks by killing multiple kansas slave-owners

Explanation:

To determine John Brown's contribution to Bleeding Kansas, we analyze each option:

• The Kansas - Nebraska Act was ratified by Congress, not John Brown, so the first option is incorrect.
• John Brown was not known for aiding Lawrence; in fact, Lawrence was attacked by pro - slavery forces, and Brown's actions were more militant.
• John Brown led the Pottawatomie Massacre, where he and his followers killed multiple pro - slavery settlers (slave - owners or supporters) in response to pro - slavery violence, which escalated the Bleeding Kansas conflict. So the third option is correct.

Answer:

by killing multiple Kansas slave - owners