Are relatively homogeneous, smaller submarkets (groups) existing inside much larger and more heterogeneous markets.
a. target markets
b. market targets
c. market segments
d. markets
e. subcultures

(C) Market segments

Explanation:

Market is a people, a place and an economic entity. It's a group of people buying and selling and having each other's needs and wants met in a particular geographical location.

Now, market segments are groups made based on similar interests in an otherwise homogenous market within the whole heterogeneous market.

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