What was the main issue involving john brown's 1859 raid in harper's ferry, virginia? a) slavery b) suffrage c) money d) secession

The correct answer is A) slavery.

John Brown was an avid abolitionist who made it his life goal to get rid of the institution of slavery. Brown was a firm believer that the only way to get rid of slavery in the US was through bloodshed. This is why he organized an invasion of a federal arsenal (aka Harper's Ferry). The goal of this invasion was to obtain guns and ammunition to start a nation wide slave rebellion that would result in the destruction of slavery within the US. Ultimately, this raid was unsuccessful and resulted in John Brown being sentenced to death.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain