To find the change in population of New York City between 1800 and 1890, we can subtract the population in 1800 from the population in 1890.
Population in 1800: 79,215
Population in 1890: 2,507,414
Change in population = Population in 1890 - Population in 1800
Change in population = 2,507,414 - 79,215
Change in population = 2,428,199
Now, looking at the answer choices, the closest value to this change in population is approximately 2.5 million.
Therefore, the answer is 2.5 million.