Software programs "spiders" are used toA．gather e-mail addresses for companies such as Yah

Software programs "spiders" are used to

A．gather e-mail addresses for companies such as Yahoo and Hotmail.

B．leave e-mail addresses on the message board for third parties.

C．create a new e-mail account.

D．search for e-mails addresses.

请帮忙给出正确答案和分析，谢谢！

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