Marcel Duchamp intended his 1917 so-called ready-made sculpture Fountain to challenge then-prevailing conceptions about the nature of art. ______, Duchamp’s Fountain did just that, raising the question of whether displaying any object in an art gallery could be said to transform the object—even as Duchamp’s sculpture was, a urinal—into a legitimate work of art.
Which choice completes the text with the most logical transition?

