The most often used application of the term virtuosity applies to music - a virtuosic piece, a virtuosic musician etc. Thus the answer to this is b. Virtuosity means extreme technical proficiency in an area of music (though it can be applied to other things as well to show mastery of a skill - a virtuosic painter etc.)
I really like I hate everything about you song I don’t remember the name been a while since I heard it but really good song
It’s C.) Restoring old paintings to their original condition.