The most numerous cruiser class depends on careful class counting

What was the most numerous cruiser class?

Possibly the British C or Town class, but large American wartime classes also compete and the answer needs verification.

The apparently simple superlative turns into a classification and production-history problem. The British C and Town classes are initial candidates, followed by a recollection that some American cruiser classes were produced in large numbers during the Second World War. These memories remain uncertain, and the ranking needs further checking.