What are the functional groups in the aspirin molecule?

\(\begin{gathered} \begin{array}{*{20}{l}} {{\text{I.}}}&{{\text{Ether}}} \\ {{\text{II.}}}&{{\text{Carboxyl}}} \\ {{\text{III.}}}&{{\text{Ester}}} \end{array} \hfill \\ \hfill \\ \end{gathered} \)

A.     I and II only

B.     I and III only

C.     II and III only

D.     I, II and III

C