How did John Brown's attack on Harpers Ferry affect many Northern abolitionists? A. They were inspired to continue fighting to end slavery.
B. They were forced to publicly support slavery in the South
C. They lost official support from the Republican Party
D. They were able to convince Southern leaders to stop supporting slavery.

D. They were able to convince Southern leaders to stop supporting slavery.

Explanation:

Abolitionist John Brown leads a small group on a raid against a federal armory in Harpers Ferry, in an attempt to start an armed slave revolt and destroy the institution of slavery.

to extend a country’s power and influence

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.