Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? A. Magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. B. Magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. C. Magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number. D. Magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number.