Original sentence: According to Richard Nelson Frye, a leading historian of Iranian and Central Asian history, the Persian migration to Central Asia may be considered the beginning of the modern Tajik nation, and ethnic Persians, along with some elements of East-Iranian Bactrians and Sogdians, as the main ancestors of modern Tajiks.Farsi became the official language and had a higher status than Bactrian, because it was the language of Muslim rulers
Edited sentence: According to Richard Nelson Frye, a leading historian of Iranian and Central Asian history, states that some elements of East-Iranian Bactrians and Sogdians, are the main ancestors of modern Tajiks.Dari-Persian became the official language and had a higher status than Bactrian, because it was the language of Muslim rulers