What data type must be used as an array index?

________ is a behind-the-scenes area with commands that control file management tasks, such as saving, printing and sharing documents

A) Backstage view B) File tab C) Start screen D) Lock screen

The radio patrol officer usually cannot receive a message if

a. the microphone switch is "open." b. the microphone switch is "closed." c. the transmitter fuse is blown. d. central dispatch is functioning properly.