34 According to the passage, which of the following statements is true?
(A) E-commerce businesses are not affected by negative customer reviews.
(B) Delivering goods quickly can lead to positive customer reviews.
(C) Few supply chain management systems are effective in practice.
(D) Customers do not need to know if certain goods are in stock.

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統計： A(9), B(85), C(6), D(5), E(0) #3255675