Which Explanation Is Currently Thought to Be the Best Reason

Which explanation is currently thought to be the best reason why transposable elements are so prevalent in eukaryotic genomes?

A) They provide a selective advantage by knocking out unessential genes.
B) They benefit an organism by regulating genes.
C) They maintain the integrity of the genome.
D) They replicate and thus are able to persist, despite being neutral or even deleterious to an organism.
E) They increase genetic variation.

Correct Answer:

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