When studying history, especially global events like these, creating a timeline can help organize events in a chronological order, allowing for a better understanding of cause and effect.
The correct chronological matches are:
\begin{itemize}
\item A. The Russian Revolution: 1917
\item B. The Fall of Berlin Wall: 1989
\item C. Soviet invasion of Afghanistan: 1979
\item D. The disintegration of the Soviet Union: 1991
\end{itemize}
This set helps understand key events that shaped the 20th century, especially concerning the Cold War and the downfall of the Soviet Union.