A Bowl of Sugar Water Is Very Stable

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

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