Final answer:
The artwork 'Taxi' by Renee Cox is significant due to its multifaceted representation of racial issues, artistic character continuity, and symbolic use of colors representative of Jamaican and black nationalist flags.
Step-by-step explanation:
The significance of the artwork 'Taxi' by Renee Cox is multifaceted. It features a character from the artist's Raje series, references the tradition of New York taxi cab drivers passing up black passengers, and the character is adorned in a combination of colors from the Jamaican and black nationalist flags, embodying a political statement as well as a personal one. These elements align with Renee Cox's broader body of work, which often explores issues of race, gender, and sexuality. Hence, the correct answer to the question is 4) All of the above.