Regarding Marketing Strategy Planning

Regarding marketing strategy planning:

A) marketing managers seldom know everything they would like to know about the needs and attitudes of their target markets.
B) marketing managers implement marketing STRATEGIES-NOT marketing plans.
C) the market environment may force marketing managers to change target markets-but their marketing mixes usually are not affected.
D) it is easier in large firms because marketing managers can count on specialists to plan each of the "four Ps."
E) All of these alternatives are correct.