43. Which of the following is true of viral marketing?
(A) It is the digital version of wordofmouth marketing.
(B) It refers to online marketing problems caused by technical glitches.
(C) It is another term for the unethical invasion of online privacy.
(D) It is an automated system that manages digital sales and marketing functions.
(E) It is a system that allows a supplier to access a customer's inventory levels online.

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