What is the Hellenistic Empire? How did it get its name?

The Hellenistic World (from the Greek word Hellas for Greece) is the known world after the conquests of Alexander the Great and corresponds roughly with the Hellenistic Period of ancient Greece, from 323 BCE (Alexander's death) to the annexation of Greece by Rome in 146 BCE. The word “Hellenistic” comes from the word Hellazein, which means “to speak Greek or identify with the Greeks. It lasted from the death of Alexander in 323 B.C. until 31 B.C., when Roman troops conquered the last of the territories that the Macedonian king had once

d. she conquered the black sea coast and parts of poland.

what are the options ?