In the following Venn diagram, the pentagon stands for 'clerks', the triangle stands for 'coffee-lovers', the square stands for 'car-owners' and the circle stands for 'social workers'. The given letters represent the persons in that particular category.

Which of the following categories of persons is represented by the letter 'D'?

A

Car-owners who are coffee-lovers but not social workers

B

Coffee-lovers who are car-owners, social workers and clerks also

C

Coffee-lovers ,who are either car-owners or social ,workers

D

Coffee-lovers who are car-owners and social workers also