Lenin responded to a crisis in soviet agriculture in 1921 by:
a. allowing peasant farmers to own land and seek their crops
b. collectivizing agriculture
c. selling russia's art treasures to raise cash
d. sending troops to the fields to confiscate crops

The good answer is:

a. allowing peasant farmers to own land and seek their crops

Explanation:

The dire situation of Soviet economy and the mutiny of the Kronstadt sailors made Bolshevik Leader Vladimir Lenin revise the war communism policies in 1921. The New Economic Policy was designed and applied. In agriculture, peasants were allowed to keep a part of their produce to sell for profit, which allowed some relief. The NEP stopped grain requisitioning and introduced some elements of capitalism.

I thinks its Hungary

Explanation:

The first time a central european border opened to citizens of Eastern Bloc countries states was in 1989 11th of september. In May 1989 the borders between Hungary and austria were opened.