Did Japanese feudalism have a positive or negative impact on Japan? PLZ ILL MARK BRAINLIEST!!!

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.

In japan, the had nearly total power, but he was also assisted by

During the era of european expansion, what was the biggest reason for spain’s push for exploration?