A Friend Shows You a Newspaper Article Titled "Magnesium's Role

A friend shows you a newspaper article titled "Magnesium's Role in ATP Synthesis." You explain that

A) magnesium does not play a role in ATP synthesis.
B) it is not magnesium but manganese that plays the role in ATP synthesis.
C) magnesium serves as a catalyst in the reaction that adds the last phosphate to ATP.
D) there are three magnesium groups within the ATP structure that help it do its work.