In one format for describing socio-economic groupings, skilled, semi-skilled and unskilled working class people would...

Explanation

This is a broad group of people deriving income from employment, including some skilled people through to unskilled.

A, B and C1 would be those people often referred to as upper middle class or upper class; whereas E would describe a broad group of the poor, the unemployed, etc.

These are rough generalisations regarding people's likelihood of income, taste, lifestyle, etc. To take an extreme example, there is probably not much point in trying to market Dom Perignon (an expen-sive brand of champagne) to the E group. But the E group might welcome promotion of a low-cost brand of tobacco or cigarettes.