153. Why was this email sent?
(A) To confirm a payment
(B) To warn about a security threat
(C) To announce a software update
(D) To request account verification
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統計: A(4), B(589), C(14), D(28), E(0) #3782085
統計: A(4), B(589), C(14), D(28), E(0) #3782085