A "sculpture" of a urinal by Marcel Duchamp and signed "R. Mutt 1917" on the side.

What is the name of the piece above

'Fountain'

Originally submitted to the newly established Society of Independent Artists, only to have it be rejected on the grounds that it was once used as a sanitary device. This sparked debate about what should and should not be filtered and what is considered 'art.'

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).