When 1,1-dichloroethene undergoes polymerisation, it forms a material with a high density and a high melting point that is impermeable to gases. It is used as cling wrapping. Which arrangement is found in a short section of the polymer chain?
- A$\{\text{CH}_2\text{CCl}_2\text{CH}_2\text{CCl}_2\text{CH}_2\text{CCl}_2\}$
- B$\{\text{CHClCHClCHClCHClCHClCHCl}\}$
- C$\{\text{CCl}_2\text{CCl}_2\text{CCl}_2\text{CCl}_2\text{CCl}_2\text{CCl}_2\}$
- D$\{\text{CH}_2\text{CCl}_2\text{CHClCHClCH}_2\text{CCl}_2\}$