A specimen of but-2-enoic acid, $\text{CH}_3\text{CH=CHCOOH}$, is examined by infrared spectroscopy. In the infrared spectrum, there is a broad absorption in the $2500$-$3000\,\text{cm}^{-1}$ interval. Which bond gives rise to this peak?
- A$\text{C=C}$
- B$\text{C=O}$
- C$\text{C-O}$
- D$\text{O-H}$