Which of the following statements about polymers is correct?
- AFats and nylons all contain the $-\text{COO}-$ linkage.
- BMonomers used in condensation polymerisation must contain both $-\text{CO}_2\text{H}$ and $-\text{OH}$ groups.
- CPoly(ethene) will decolourise bromine.
- DProteins with the $-\text{CONH}-$ linkage are biodegradable as they can be hydrolysed.