Final answer:
A column break is used to force a new column to start at a specific point in a document with multiple columns.
Step-by-step explanation:
The correct answer is A. Column break. A column break is used when you have two or more columns and you want to force a new column to start at a specific point. It helps to control the layout and formatting of a document with multiple columns, allowing you to control the flow of content. For example, if you want a new paragraph or section to begin in a new column on a page, you can insert a column break at the desired point.
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