Analyse data from spectra, including mass spectroscopy and infrared to determine the identity and structure of organic molecules. The following subject matter may be assessed in the internal assessments.

An organic compound Z has the molecular formula \(\text{C}_4\text{H}_8\text{O}\). The infrared spectrum of Z shows a strong absorption at \(1715\,\text{cm}^{-1}\) and no absorption at \(2500{-}3000\,\text{cm}^{-1}\). The mass spectrum shows a base peak at \(m/z = 43\) and a molecular ion peak at \(m/z = 72\). Which statement correctly identifies Z?