Which best describes the growth of the Incan Empire?

The growth of the Inca Empire was meteoric. Though precise dates for its beginnings remain elusive, the realm known to the Inca as Tahuantinsuyu, or "The Four Parts Together," arose sometime in the early 1400s. By 1532, when the Spaniard Pizarro executed the final Inca ruler, Atahualpa, the empire covered about 300,000 square miles

just like you man, i personally think its either c or d

explanation:

but good luck with the test man