Alicia worked in the customer service department and received a large amount of e-mail. her job required her to open e-mail and attachments from people she didn't know. because she was concerned that doing so could harm her computer, she kept this utility updated to protect her computer. antivirus cleaner data encryption firewall

antivirus

Explanation:

An antivirus is a software designed to detect and remove computer viruses. Effective antiviruses can detect, prevent and remove malicious software (viruses, worms, trojans). Some can even remove spyware and adware.

The term antivirus is a little misnomer, since this software removes several types of malicious threats, not only viruses.

a. money supply  

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answer makes less frequent trips to the bank and firms make less frequent price changes;