Marketing Strategy Planning Is Difficult for Marketing Managers Because

Marketing strategy planning is difficult for marketing managers because:

A) they rarely know enough about the needs and attitudes of their target markets.
B) other dimensions of the market environment may force changes in possible marketing mixes.
C) proposed plans for each of the "four Ps" have to be blended together.
D) competitors are usually trying to satisfy the same or similar needs.
E) All of these alternatives are correct.