How does the modern study of history challenge earlier histories

By questioning whether their sources are reliable.

Explanation:

in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

explanation:

the answer is b: an economic crisis throughout the country.