Written in an amiable style, the book provides a comprehensive overview of European wines that should prove 
to both the virtual novice and the experienced connoisseur.
I think maybe C? Not sure though, so don't take my word as gospel :)
I believe that coherence is more of sticking with one idea above the other definitions listed.
The right answer for the question that is being asked and shown above is that: "C. gerund." N<span>apping is an effortless activity. The word napping which ends with -ing is the gerund of the sentence because it is an action word that serves as the subject.</span>
