Its Is used for repetition AND summary
Answer:
I'm not completely sure but I would say: C.) Unlike Michelangelo, few painters had the talent to also sculpt statues.
It is the "also" that makes it sound off.
"A coherent narrative will be easy to follow and more enjoyable for your reader." Looking at this, we see the words, "easy to follow," and, "more enjoyable." These are our clue words. We can rule our both A, B and D because none fit in as a definition referring to easy. C, however, fits the definition and this is your answer.
"A 'connected' narrative will be easy to follow and more enjoyable for your reader."