Beginning in the early 1990s, many african nations joined the worldwide trend toward

The answer to the fill in the blank question is option D) Democracy

All through the 1970s and 1980s the African continent suffered from regional rivalries, military dictatorships and autocratic governments. All these were  backed by either Soviet Union or the United States who used the countries for their proxy wars.

By the 1990s, as the cold war ended, many African nations embraced change, gave up their past systems and started to gradually move towards democracy.

The re-election of the president abraham lincoln.

Yeah i’ll call ya tomorrow but i’m not sure if you wanna talk about it later