How can this sense of nationalism be a bad thing in society?

A sense of nationalism that is too large can affect one country's relations with another country. These bitter relations were the primary cause of WW1.

Explanation:

to reform the distraught soviet union, the democratization of the communist party was promoted through party secretary mikhail gorbachev's policies of “perestroika” and “glasnost.” perestroika refers to the reconstruction of the political and economic system established by the communist party.

answer; (b) asia;