split the document window
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Alt+ctrl+c
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Alt+c
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Ctrl+c
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Alt+ctrl+S
D
Correct answer
Explanation
In Microsoft Word, the keyboard shortcut to split the document window into two panes is Alt+Ctrl+S. This allows you to view different parts of the same document simultaneously. Alt+C copies selected text, Ctrl+C copies, and Ctrl+C alone is for copying - not splitting.