Final answer:
Jeff Koons is credited with his artwork 'Rabbit' because he designed it, even though he did not physically make it himself. His method of art fabrication, like that used for the 'Balloon Dog' sculptures, involves directing a team of assistants to ensure each piece meets his vision. The correct option is a.
Step-by-step explanation:
Even though Jeff Koons didn't make the sculpture Rabbit with his own hands, it is considered his work because he designed it. The artistic practice of using assistants to execute works is not new and has been used by various artists, such as Andy Warhol.
Koons conceptualizes his pieces and then guides his team through a meticulous process to ensure the final product remains true to his vision. This is clear in works like his Balloon Dog sculptures, which have a distinctive mirror-polished stainless steel surface and transparent color coating.
Koons' art fabrication method involves a precise color-by-numbers system that allows his large team of assistants to produce artworks to his exact specifications, as if they were created 'by a single hand'.
Hence, Option a is correct.