Explanation

anomalies, daunting, and authoritative

For the first blank, recycle the clue differences. Of the choices, only anomalies means differences.

The second blank relates how these differences affect the task of literary scholars, so a word like difficult or challenging would make sense. Of the choices, only daunting makes sense.

The third blank describes the type of texts that such differences would make so challenging, so a word that means genuine or authentic would make sense. Of the choices, authoritative is the best fit.


Hence option B, E and I are correct!
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The question feels incomplete; as if something should come after authoritative.

Fixed. Thank you.

The word: texts missed in the end.

Regards
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Can someone please explain why - authoritative and not innovative?

the differences among extant versions of the same work—resulting from printing errors, editing demands, or constant revisions

From this the worn is not innovative but they have a problem in terms of reliability. A such, the answer is I

Ask if you do need something else in terms of explanation

Regards
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for third blank, decisive clue is missing for choosing option