
Passage: With the advent of the Mid-Autumn Festival, a supermarket launched a promotion to give away a box of moon cakes with a purchase of more than 500 yuan in order to attract consumers. The supermarket manager said that since the promotion began, the number of cash registers with a single income of more than 500 yuan has increased by nearly 30%, indicating that the promotion has been successful and achieved the goal of expanding market share.
Question: If the following statement is true, which of the following weakens the manager's assertion most strongly?
A. A.Customers who are used to small purchases are less likely to be affected by promotions
B. B.Some customers who buy more than 500 yuan at a time during the event usually shop for more than 500 yuan
C. C.In the promotion, most people who buy more than 500 yuan at a time are long-term customers of this supermarket, who increase the amount of single shopping, but reduce the number of purchases
D. D.Customers who are attracted to the supermarket by the promotion may not come back after the event is over
Answer: