From my understanding, limestone wears down by water (rain and snow). This could be bad if the limestone is outside in a rainy/snowy environment.
The answer is A. Pastiche. A pastiche is an imitation of another artist's work, and is considered a form of forgery.
A note head, a stem and a flag
Yes I belive that would work. But I am not so sertion on if the play-doh would work or not...