Which group stays the same in an experiment? A
Variable

B
Control

C
Multitude

D
Observable

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast

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: