How did john d. rockefeller gain control of the oil industry?

a. he formed a trust
b. he practiced horizontal integration
c. he joined a cartel
d. he practiced free trade

when people started to question traditional christian beliefs, they became criminals in the eyes of the church: they were accused of heresy and then, executed. the church held unbelievable power and anyone who tried to defy it or its beliefs, was demonized and persecuted.

mark brainliest and have a stunning day!

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.