JAMB - Economics (1998 - No. 20)
The petroleum industry in Nigeria is?
the sole source of the nation's revenue
the oldest industry in the country
the mainstay of the economy
a factor in the decline in the nation's foreign reserves
توضیح
The petroleum industry in Nigeria is the largest on the African continent. As of 2014, Nigeria's petroleum industry contributes about 14% to its economy. It is one of the pillars of the nation's economy.