The appropriate citation would be a MLA for your major or course
Answer:
rockefeller found out a way to refine oil for cheap
Explanation:
I believe the answer is D, say it out loud and it will make sense :D
Lost of children
Mary and Percy were married in London in an unsuccessful attempt to gain custody of his two children by Harriet. Three of their own children died soon after birth, and Mary fell into a deep depression that did not improve even after the birth in 1819 of Percy Florence, her only surviving child.