Electronic mail has been in widespread use for more than a decade, simplifying the flow of ideas, connecting people from distant offices and eliminating the need for meetings, but e-mail should be carefully managed to avoid unclear and inappropriate communication. As time goes on and more people surf the Net, the amount of unsolicited e-mail grows. Some folks reasonably assume that cyberspace mirrors many aspects of other forms of communications. It would seem that since telemarketing and direct mail are successfully used as marketing techniques for many businesses, it should follow that direct e-mail or unsolicited e-mail should also work. This topic is hotly debated between experienced Internet users and newcomers. Unlike receiving promotional materials through the mail or over the phone, e-mail does carry a cost to the recipient. "Bandwidth" is used every time when an e-mail message is sent and places a load on existing resources. The process of sending unsolicited e-mail to large, untargeted lists, or through mailing list discussion groups or Usenet newsgroups, is known as "spamming". Spamming wastes bandwidth. Imagine if it became common practice for businesses to market this way. Not only would it be annoying for many, the load on the system would translate to higher access fees. Unlike regular mail where the sender pays the cost of delivering the mail, e-mail is cheap to send, and in some cases, expensive to receive. Many businesses responsibly market by e-mail, for example, by inviting existing customers or website visitors to receive future e-mail announcements. Some of the free e-mail services are advertiser-supported and hence using e-mail marketing in an upfront acceptable manner. Hopefully, this will be the norm, rendering the inconvenience of spam a thing of the past.

单选题 Though e-mail marketing will inevitably get more sophisticated, the author believes ______.

单选题 The general use of the term "spamming" in this text refers to ______.

单选题 The difference between regular mail and e-mail in terms of costs is ______.

单选题 In order to market responsibly, the author suggests that business ______.

单选题 Which of the following can best sum up the text?