Frank made the drawing of ATP shown below. How is this molecule most often involved with the production of energy in a cell? (SC.912.L.18.9)

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A. Energy is released when the third phosphate group breaks off.
B. Energy is produced when a fourth phosphate group binds to the molecule.
C. Energy is produced when the sugar ribose is metabolized in the Krebs cycle.
D, Energy is released when the adenine base is used to form part of an RNA molecul

A. Energy is released when the third phosphate group breaks off.