What kind of tactics to end slavery did abolitionists use?

all of these
escaped slaves to freedom
armed force
reminders of religious and moral obligation

Explica por qué el primer ciclo económico en brasil fue agrícola y no minero.

What happened between 1804 and 1815

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.