A technician needs to decrease the time it takes to install an operating system on 100
computers. Which of the following installations would the technician use to reduce hands-on
time spent on each computer?

A.
Upgrade installation

B.
USB installation

C.
Unattended installation

D.
Clean installation

Explanation:

Reference:
http://en.wikipedia.org/wiki/Installation_(computer_programs)#Silent_installation