The __________ incorporates routines that allow the user or programmer to create, delete, modify, and manipulate files by name.

The ________ test is an IF function that tests for a true or false of a condition

Fill in the blank(s) with correct word

“Most of the challenges in creating good mobile usability boil down to ___________.”

a. making user experiences delightful b. chopping content up into small enough chunks c. making good tradeoffs