Which of the Following Describes the Purpose of Changing the Vertical

Which of the following describes the purpose of changing the vertical alignment of the page?

A) Changing the vertical alignment of the page specifies how text is positioned relative to the top and bottom of the page.
B) Changing the vertical alignment of the page specifies how text is positioned relative to the left and right of the page.
C) Changing the vertical alignment of the page specifies whether the page has landscape or portrait orientation.
D) Changing the vertical alignment of the page specifies the size of the margins on a page.