A-A+
What does unwanted e-mail messages do to the p
问题详情
What does unwanted e-mail messages do to the providers of the Internet services？
A．Raising their cost.
B．Raising the Internet speed.
C．Improving their business.
D．Attracting investment.
参考答案
正确答案：A
解析：细节题型。见第四段第一句：The growth in unsolicited commercial electronic mail imposes． significant monetary costs on providers of Internet access services, businesses，and educational and nonprofit institutions that．．．因此选项A是答案。
