Hiding a message in images is an example of stenography

What is meant by the term usability?

A. how often a security solution or device must be updated and how long the updates take B. the amount or percentage of time a computer system is available for use C. the probability that a failed security solution or device can be restored to its normal operable state within a given timeframe using the prescribed practices and procedures D. making a security solution or device easier to use and matching the solution or device more closely to organizational needs and requirements

The first variable in a one-dimensional array is assigned a subscript of ____.

A. 0 B. 1 C. 2 D. 3