Final answer:
Fitzgerald introduces rumors about Gatsby before he tells his own story to create intrigue and highlight the theme of appearance versus reality.
Step-by-step explanation:
Fitzgerald most likely chose to introduce these rumors before letting Gatsby tell his own story to create intrigue and generate interest in the character. By presenting Gatsby through the perspective of others and their gossip, Fitzgerald builds a sense of mystery and anticipation around Gatsby's true identity and past. This technique also highlights the theme of appearance versus reality in the novel, as Gatsby's persona is constructed through rumors and hearsay.
Learn more about The role of rumors in introducing Gatsby's character