Which statement(s) accurately represent what Drucker means when he says that marketing “is the whole business seen from

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Which statement(s) accurately represent what Drucker meanswhen he says that marketing “is the whole business seen from thepoint of view of the final result, that is, from the customer’spoint of view”?
Group of answer choices
(a) A business should know the customer so well that the productor service fits him or her—and the product sells itself.
(b) A business must be more product-oriented thanmarket-oriented.
(c) A business must base its rewards on its contribution to thecustomer.
Both (a) and (b)
Both (a) and (c)
Both (b) and (c)
All of these statements
None of these statements