The city with a tropical rainforest biome based on the provided information is D. Manaus.
Tropical rainforest biomes are characterized by high temperatures (typically averaging above 64°F year-round) and high annual precipitation (typically exceeding 70 inches). Manaus has an average monthly temperature consistently around 80°F and an annual precipitation of 84 inches, fitting the criteria for a tropical rainforest biome.
In contrast, Riyadh has low annual precipitation, Nairobi has lower average temperatures, and Oslo has a cold climate with much lower temperatures and insufficient precipitation.