The desktop version of ________ has an option to turn its popup blocker off and on

One trend involving servers, as well as mainframe computers, is _____ that is the creation of practical versions of a computing resource.

A. ?virtualization B. ?fragmentation C. ?normalization D. ?optimization

____________________ is useful for zeroing in on particular aspects of a project based on particular criteria.

Fill in the blank(s) with the appropriate word(s).