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.)
Because some dye might not stick to the materials or work on the materials of the cloths or if you have a budget of $10 and cant go over but you spend $9 on sloths and the dye cost $2.50 then you would of gone over budget.
D: Circuit
A device that uses electricity to perform a task is called a(n) (electrical) circuit.
The answer would be meter