Answer: c. Spoke related languages, among which are sanskrit, persian, and greek.
The Indo-Europeans were migrant, pastoral people that spoke the Proto-Indo-European language, from about 4000 BC to 1000 BC. Their descendants spread through Europe and parts of Asia, creating new cultures by joining with people they met along the way. These migrations gave rise to most languages in Europe, Greater Iran and the Indian subcontinent. Indo-European languages are, therefore, the largest and most broadly spoken language family in the world.
