Which statement could the author use to support the main idea of paragraph 5? a) levi coffin, a quaker from indiana, used a secret room in his home to more than 2,000 slaves escape to freedom. b) secret passages were often constructed in palaces so that royalty could escape from deadly attacks. c) today, secret passages and secret rooms are usually constructed to amuse homeowners. d) slavery was eventually outlawed in the united states by the thirteenth amendment.