Though the Indo-European mother tongue no longer exists,it probably originated

Question

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Linguists and archaeologists have traced the origins of the Indo-European language family to an area north of the Black Sea, now modern-day Ukraine and Russia. This region is known as the Pontic-Caspian steppe, and it is where the Yamnaya culture emerged around 5,000 years ago, which is believed to be closely linked to the spread of Indo-European languages. Therefore, option A is the best choice.

Though the Indo-European Mother Tongue No Longer Exists,it Probably Originated