You are creating a dial-up connection on your Windows 2000 portable computer to connect to your customer’s dial-up server. You are not sure which type of server your customer is using for dial-up connections. You want to ensure that your dial-up connection authentication is secure and that your logon information is not sent in plain text. You view the Advanced Security Settings dialog box as shown in the exhibit. Which option or options should you disable in the Advanced Security Settings dialog box?（）

• A、Unencrypted password （PAP）
• B、Shiva Password Authentication Protocol （SPAP）
• C、Challenge Handshake Authentication Protocol （CHAP）
• D、Microsoft CHAP （MS-CHAP）
• E、Microsoft CHAP Version 2 （MS-CHAP v2）
• F、For Microsoft CHAP based protocols.