Viruses can worm their way into your puter from a variety of sources that contain viruses.Once viruses get into your 21______ business puter, it can wreak havoc 22______ a variety of ways that 23______ from sending spam emails out to your database of

Viruses can worm their way into your puter from a variety of sources that contain viruses.Once viruses get into your 21______ business puter, it can wreak havoc 22______ a variety of ways that 23______ from sending spam emails out to your database of customers to pletely 24______ your puter. The best way to 25______ viruses, worms and other problems from 26______ your puter and your online business is to install anti-virus software. Also be sure to keep the antivirus software 27______.
Hackers and other unauthorized individuals accessing information on your customers and personal and business financial information can create a myriad of problems including identity theft. In order to prohibit unauthorized sources 28______ accessing all of this pertinent information, you should install a firewall, which 29______ unauthorized access to your puter. It is just as important to 30______ your firewall by updating it regularly to further protect your puter.
30.

A.maintain

B.serve

C.install

D.decorate

正确答案是A