Pls answer the question below:

What is linux? an open source operating system a version of ms dos the first version of unix the newest technology available

It is vital to research each of the services you plan to disable before implementing any change, especially on critical machines such as the: a. servers in the test environment. b. domain controller and other infrastructure servers. c. desktops that have previously been attacked. d. desktops used by upper-level management.

Which text format is this, "the text is transcribed exactly as it sounds and includes all the utterances of the speakers. "?