Oil Has Had What Kind of Economic Impact on Nigeria's

Oil has had what kind of economic impact on Nigeria's economy?

A) It has provided enormous revenues that have been channeled by the state to benefit wide sectors of society.
B) It has provided enormous revenues but has also fostered a neglect of other economic sectors.
C) It has provided enormous revenues that have been used to invest in the country's infrastructure so as to increase manufacturing.
D) It has provided enormous revenues that have been used to finance the domestic production of technology for additional extraction.
E) It has had all of the above effects.