The statement that is true of centered alignment is: D. It is the least readable alignment and should be reserved for brief lines of text rather than full paragraphs.
Centered alignment is a way of arranging text that leaves both sides of the text with ragged edges. Centered alignment is best used for subheadings and headings.
When used in full paragraphs, it makes reading difficult because the reader finds it difficult to move from one line to another.
So, option D is correct.
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