A Bowl of Sugar Water Is Very Stable

A bowl of sugar water is very stable.In a cell,however,it is rapidly broken down into carbon dioxide and water,releasing stored energy.What is the best explanation for this observation?

A) Glucose becomes more chemically reactive inside of a cell.
B) Cells use energy to break down the glucose.
C) Glucose is only broken down while dissolving into a watery solution, such as inside the cell.
D) Glucose cannot be broken down outside of a cell.
E) Enzymes in the cell catalyze the breakdown of the glucose.