许可Email营销的基本要素不包括( )。\n \n \n \n \n \n \n

\n \n \n \n A.\n 用户事先许可\n

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\n \n \n \n B.\n 通过电子邮件传递信息\n

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\n \n \n \n C.\n 信息对用户是有价值的\n

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\n \n \n \n D.\n 对用户收费\n