it is in management information system please answer quickly I don't have time only 10 minutes

Instead of buying 2000 CPUs for the computer usage, Oman tel purchased a server and connected all the 2000 employees to that server as if they were using 2000 different computers. Omantel saved a huge amount of money in terms of 2000 CPU s and their power supply and cost. The technology discussed here is_ O a Virtualization O b. Device specific storage of data Oc None of these O d. Cloud storage of data All of the following are enterprise collaboration systems except O a Microsoft office Ob. Google meet OC Microsoft teams Od Cisco WebEx Every organization is into strategic planning. The top level management and the board of directors of the company are responsible for the review of performance of various objectives of the organization. This review analysis helps the firm to know if any deviations from the target. The top level management uses _ for the decision making O a Executive information system O b. Transaction processing system Oc Operation support system O d. Expert system