After the war peaking in 1946
The History of the Standard Oil Company is a 1904 book by journalist Ida Tarbell. It is an exposé about the Standard Oil Company, run at the time by oil tycoon John D. Rockefeller, the richest figure in American history.
I think is either A or B i hope this helps!:)

Economic issues caused many people to emigrate from nicarague.
Emigration means leaving a country and those who leaves a country are known as emigrants.
hence the correct option is
option A ✔✔
Thanks