Which of the following expansion slots is 64-bit?

After cleaning off a virus and some malware, the computer still is not functioning correctly. The user does have a fairly recent version of data on the computer. Which of the following would be best to use to reset the computer to the condition it was in when it was purchased?

A) ZIP B) Recovery Console C) Factory restore disc D) Imaging software

An O(n) algorithm is referred to as having a _______ run time.

a. constant b. linear c. quadratic d. negative