Answer ? Please help

Tanya was used to using word, and she did some work for her brother mike, who was using wordperfect. tanya was quickly able to use wordperfect for windows with little difficulty, since many of the commands for it were the same as the commands for word. tanya's ability to use wordperfect best illustrates:

Where do most people in arabia and iraq live? a. in the fertile crescent b. in the rub, al-khali c. in cities d. in and around mecca

What is the difference between the idea of stare decisis and something being constitutional?