How did confederate president jefferson davis react to lincoln's plan to resupply fort sumter?

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.

What are new social classes emerged due to advancement in agriculture ?

Who is the best protagonist of their respective series? a. asta b. boruto c. ichigo d. deku