30. What is the main purpose of the buyer’s email?
(A) to confirm the shipping date
(B) to change payment currency to USD
(C) to get a better price for his new order
(D) to express the economy is in recession
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統計: A(1), B(1), C(1), D(1), E(0) #3384769
統計: A(1), B(1), C(1), D(1), E(0) #3384769