Answer: confidently
Explanation: your definition of confidently is "self-assuredly"
A right or immunity granted as a peculiar benefit, advantage, or favor : prerogative especially : such a right or immunity attached specifically to a position or an office.
The answer to this question is B
"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."