86. The infrared spectrum of synthesized [Co(CO)2(CN)2Br2]- exhibits two bands attributable to C-O stretching but only one band attributable to C-N stretching. What is the most likely arrangement of the coordinated CO and CN ligands around the Co center, respectively? (A) cis C-O, trans C-N (B) cis C-O, cis C-N (C) trans C-O, cis C-N (D) trans C-O, trans C-N (E) None of the above