What is apparently the most difficult external variable for marketing managers to forecast,influence,or integrate into marketing plans?

Name: What is apparently the most difficult external variable for marketing managers to forecast,influence,or integrate into marketing plans?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Social factors and changes are difficult to foresee,because they are usually slow and/or small changes.Also,it is very difficult for one company to affect social factors in any appreciable manner.

What Is Apparently the Most Difficult External Variable for Marketing