Choose all solutions to the equation. Use Capital Letters ONLY. If you choose more than one letters, please arrange them in alphabetical order, please. If cos A = 2, then A. A=+2k, k: integer OR B. A=++2km, k: integer OR C. A=²+2km, k: integer OR A = -arccos +2km, k: integer OR A = ±²+2km, k : integer D. E. OA,C,E A, B, D O A, B, C OC, E

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