A.
可能的原因有：
1. 信用卡第一次使用尚未開卡。
2. 信用卡卡號或到期日輸入錯誤。
3. 信用卡已超過到期日使用期限。
4. 超出信用卡使用額度或餘額不足。
5. 信用卡授權時，網路斷線。
提醒您！請留意輸入的信用卡卡號、姓名、到期日以及卡片背後末3碼是否正確。
如果依然收到授權失敗的通知，請與您的信用卡發卡銀行聯絡。
Possible reasons include:
1. The credit card is being used for the first time and has not yet been activated.
2. The credit card number or expiration date was entered incorrectly.
3. The credit card has expired.
4. The credit limit has been exceeded or the balance is insufficient.
5. The internet connection was lost during credit card authorization.
Please note that the credit card number, name, expiration date, and the last three digits on the back of the card are correct.
If you still receive an authorization failure notification, please contact your credit card issuing bank.
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