Marketing professionals understand that people have needs, wants, and demands. a demand is a current want for something that the customer has money to pay for a need for basic necessities, such as food, clothing, and shelter a need that is really a want, meaning the person can live without what they demand a want for an item that is much in demand by a great number of people

The correct answer is:  [C]: 

 "a want for an item that is much in demand by a great number of people" .

Note:  Let us consider the other answer choices:

Choice:  [A]:  "a need for basic necessities, such as food, clothing, and shelter."
This refers to a "need" — NOT a "demand" ; so we can rule out "Choice: [A] " .

Choice:  [B}:  "a need that is really a want, meaning the person can live without what they demand" . 
This refers to a "want" — NOT a "demand" ; so we can rule out "Choice: [B] " .

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Growth. possibly dedication.