A feature of addition polymerisation is that the empirical formulae for the polymer and for its monomer are identical. The absorbent material used in babies’ disposable nappies is made from the addition polymer shown. Which monomer could this addition polymer have been formed from?
- A$\text{CH}_3\text{CH(OH)CO}_2\text{H}$
- B$\text{HOCH}_2\text{CH}_2\text{CO}_2\text{H}$
- C$\text{H}_2\text{C=CHCO}_2\text{H}$
- D$\text{HO}_2\text{CCH=CHCO}_2\text{H}$