Which empirical formula is shown by the organic acid formed when acid in the stomach hydrolyses the ester $\text{CH}_3\text{CH}_2\text{CH}_2\text{CO}_2\text{CH}_3$, the substance that gives apples their aroma?
- A$\text{CH}_2\text{O}$
- B$\text{CH}_4\text{O}$
- C$\text{C}_2\text{H}_4\text{O}$
- D$\text{C}_3\text{H}_6\text{O}_2$