A Bowl of Sugar Water Is Very Stable

A bowl of sugar water is very stable.If you feed it to cells it is rapidly broken down into carbon dioxide,water,and ATP.What is the best explanation for this reaction?

A) Enzymes in the cells catalyze the breakdown of the glucose.
B) Cells use energy to break down the glucose.
C) Glucose becomes more chemically reactive inside of  cells.
D) Glucose cannot be broken down outside of cells.
E) Glucose is removed from the cells by active transport.