Answer:
D. Indo-European
Step-by-step explanation:
With the name of Indo-European languages is known the largest family of languages in the world in number of speakers. The Indo-European family, to which most of the languages of Europe and South Asia belong, includes more than 150 languages spoken by around 3200 million people (approximately 45% of the world population), of which about 1200 million they correspond to speakers of the Indo-Iranian languages and about 950 million speakers of the Romance languages.