Final answer:
The character from The Great Gatsby described with the given characteristics is Tom Buchanan. He represents old money, and his behaviour evokes an image of the entitled and prejudicial upper class of the 1920s.
Step-by-step explanation:
The character in F. Scott Fitzgerald's novel The Great Gatsby described as "old money," "hulking," "aggressive," "confrontational," and "racist," is Tom Buchanan. Tom epitomizes the arrogance and entitlement associated with the old wealth of East Egg, and his behaviour throughout the novel consistently reflects these attributes. His wealth is inherited, which sets him apart from characters such as Jay Gatsby, whose fortune is self-made, thereby embodying the 'new money' persona. Tom's confrontation with Gatsby over Daisy and his disdain for Gatsby's lower social status, as well as his overtly racist comments, underscore his superiority complex and fear of social change. As such, Fitzgerald presents Tom Buchanan as a stark contrast to other characters and uses Nick Carraway's flawed, but insightful narrative to provide a unique and universal perspective on the socio-economic tensions of the 1920s. The answer to the described question is D. Tom Buchanan.