Which of the Following Criteria Should a Marketing Manager Use

Which of the following criteria should a marketing manager use when segmenting a broad product-market?

A) The segments should be substantial (big enough to be profitable) and operational (useful for identifying customers and deciding on marketing mix variables) .
B) The people within a market segment should be as homogeneous as possible with respect to the segmenting dimensions and their likely response to marketing mix variables.
C) The people in different market segments should be as heterogeneous as possible with respect to the segmenting dimensions and their likely response to marketing mix variables.
D) All these answers are correct.