Match the events that contributed to the fall of the soviet union with the years in which they took place.
1- the soviet union invaded czechoslovakia and reversed its economic reforms.
2-workers in poland won higher wages after an uprising.
3-yugoslavia parted ways with the soviet union because of political differences.
4-military forces began constructing the berlin wall.
a- 1948
b- 1956
c- 1961
d- 1968

Here are the matches:

1- The Soviet Union invaded Czechoslovakia and reversed its economic reforms,  D.1968
2-Workers in Poland won higher wages after an uprising. B. 1956
3-Yugoslavia parted ways with the Soviet Union because of political differences. A. 1948
4-Military forces began constructing the Berlin Wall. C.1961

All of these events keep strengthening the west's relation with these countries and weakened Soviet Union's position even among its neighboring countries.

Ithink the answer is a c hope that you