Context: Until the 20th century, the language's spoken form was the language of only the upper noble classes and urban population, as Russian peasants from the countryside continued to speak in their own dialects. By the mid-20th century, such dialects were forced out with the introduction of the compulsory education system that was established by the Soviet government. Despite the formalization of Standard Russian, some nonstandard dialectal features (such as fricative [ɣ] in Southern Russian dialects) are still observed in colloquial speech.

Question: When did Russian language spread to the peasants?
Answer: the 20th century

Question: Who spoke Russian before the 20th century?
Answer: the upper noble classes and urban population

Question: When did the Soviets establish required education?
Answer: the mid-20th century

Question: What nonstandard feature does Southern Russian use?
Answer: fricative

Question: When did the Soviet government begin only speaking fricative?
Answer: Unanswerable

Question: What kind of education system was used to teach the history of the noble classes to peasants?
Answer: Unanswerable

Question: Who was responsible for formalizing colloquial speech?
Answer: Unanswerable

Question: What nonstandard feature do the noble classes have?
Answer: Unanswerable

Question: In the mid 20th century what  group was the only one that used colloquial speech?
Answer: Unanswerable