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Which of the following are oxidation-reduction reactions? I. PCl 3 + Cl 2 → PCl 5 II. Cu + 2AgNO 3 → Cu(NO 3) 2 + 2Ag III. CO 2 + 2LiOH → Li 2CO 3 + H 2O IV. FeCl 2 + 2NaOH → Fe(OH) 2 + 2NaCl A. IV B. I and II C. I, II, III, and IV D. III E. I, II, and III