________ Markup view provides a less cluttered view of the document, using red vertical lines to indicate changes and balloons to indicate comments

A primary key field is used to ensure that each record is ________

A) unique B) valid C) saved D) duplicated

Suppose you wanted to declare a variable called mat that is an array of arrays of ints. The code to declare this variable would be ____________________.

Fill in the blank(s) with the appropriate word(s).