The Soviet Government in the 1980's Never Abandoned the Ruble

The Soviet government in the 1980's never abandoned the ruble as the official currency.However,the people of Moscow preferred to accept

A) cigarettes in exchange for goods and services,because they were convinced that cigarettes were going to soon become hard to come by.
B) American dollars in exchange for goods and services,because rubles were extremely hard to come by.
C) goods such as cigarettes or American dollars in exchange for goods and services,reminding us of the fact that government decree by itself is not sufficient for the success of a commodity money.
D) All of the above are correct.