________ references change when formulas are copy and pasted

What tool should be used to create real-time monitors that can be customized to show specific data on hardware, protocols, and applications?

A. Task manager B. Resource monitor C. Performance monitor D. Message analyzer

In a regular expression, the dot character "." matches any single character. When the dot character is followed by a(n) ________, the regular expression matches any number of unspecified characters.

a. plus sign (+) b. question mark (?) c. dollar sign ($) d. asterisk (*)