Question: What area was the name Dari connected to by medieval Iranian thinkers?

Is "Medieval Iranian scholars such as Abdullah Ibn al-Muqaffa (8th century) and Ibn al-Nadim (10th century) associated the term "Dari" with the eastern province of Khorasan, while they used the term "Pahlavi" to describe the dialects of the northwestern areas between Isfahan and Azerbaijan, and "Parsi" ("Persian" proper) to describe the Dialects of Fars." the correct answer?
Select from: (A). yes (B). no
(A).