--- Journalists have to work very quickly in order to_______.

--- I know. I like that. It’s very challenging.

A．meet their deadlines

B．earn a high salary

C．avoid being fired

D．make both ends meet

某电子商务公司的业务员乙收到了地址为客户甲的含数字签名的邮件，他可以通过验证数字签名来确认______。

A．邮件中是否含有病毒

B．邮件在传送过程中是否被篡改

C．邮件在传送过程中是否被窃取

D．邮件在传送过程中是否加密