Examination of the amino acid composition of a newly isolated protein indicates the presence of 10 lysines, 5 arginines, and 3 methionines. When the protein is treated with cyanogen bromide, four peptides are obtained. When it is treated with trypsin, 15 peptides are obtained. What do these results suggest regarding the sequence of the protein? A. The protein has a lysine or methionine at its C-terminal end. B. The protein is cyclic in nature with no free N or C-terminal ends. C. The protein has a lysine or arginine at its C-terminal end. D. The protein does not have lysine, arginine, or methionine at its C-terminal end.