which was the most important lasting impact of alexander's conquests?

a. the creation of a new empire
b. Macedonian domination of Greece
c. the spread of greek ideas around the ancient world
d. the division of the empire among his generals

c. the spread of Greek ideas around the ancient world

Alexander's conquests led to the spread of Greek culture, language, and ideas throughout the lands he conquered, including Egypt, Persia, and parts of India. This cultural diffusion, known as Hellenization, had a lasting impact on the development of art, architecture, literature, philosophy, and religion in these regions. It also helped to shape the future of Western civilization.