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 just took the quiz and I have the REAL answers, not that garbage response above me:
1)Edge Select
2) Change the object's color and to make it shiny
3) Influence
4) You want two objects to change together but remain separate objects.
5) a cylinder