When Deciding How Far to Carry the Segmenting Process

When deciding how far to carry the segmenting process,

A) profit should be the balancing point--determining how unique a marketing mix the firm can offer to some target market.
B) it is easier to develop effective marketing mixes for larger, more heterogeneous segments.
C) cost considerations encourage less aggregating.
D) the threat of potential competitors suggests more aggregating.
E) All of the above are true.