What color is displayed if each color in the RGB system is saturated?

Investigations into hackers can be difficult because even with a full audit trail showing that a user came from a particular account on a particular ISP,

A) Often only billing information is available, which does not prove identity B) The hacker may use more than one ISP C) ISPs almost never release the necessary information D) All of the above

Which command ends a case statement?

A. ;;end B. !!end C. stop D. esac