Samuel was given the diagram below and asked to prove that AC congruent BD. What would be the fifth step of the proof? Given: quadrilateral ABCD is a rectangle Prove: AC congruent BD A. bad = cda, using the sas congruence theorem B. abc = dac, using the aaa congruence theorem C. abd = acd, using the sss congruence theorem D. acb = cda, using the sas congruence theorem