We can actually infer here that the most clearly central idea of the paragraph is: A. Companies tend to marginalize their products and services.
Central idea actually refers to the major message or lesson that a passage carries which a writer or author wants to pass across to the readers. Central idea usually carries the theme as well. It shows the lesson that every individual reading the passage should learn or grasp.
The passage that completes the question is seen below:
Because they come from a business background, executives tend to have little to no understanding of their company’s product or service whether it’s frozen potatoes or deep tissue massages. Why, therefore, would an executive ever bother to invest in his company’s product or service when he can invest in sales, marketing, account management, or something else that has meaning in his world?
Thus, we see here that option A is actually the most clearly central idea of the given passage.
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