Which essay did andrew carnegie write?

"the origin of species"

"the gospel of wealth"

"social darwinism"

"the truth about standard oil"

Out of the following choices, Andrew Carnegie wrote the essay "The Gospel of Wealth." He wrote the article in June 1889. 

No we should just pass

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful