What is a grassroot campaign?

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 was the significance other than the obvious harm to us forces of the terror attack on the uss cole in 2000

How does the pyramid of giza include art, science, math, or a need for infrastructure?