Nigeria is experiencing widespread water polution in the Niger River Delta region. What is the primary cause of this problem?

a. oil spills

b. improper dumping by factories

c. too many older vehicles on the roads

d. too few laws to make polluting illegal

The primary cause behind Nigeria experiencing widespread water pollution in the "Niger River Delta" region is the oil spills that occur there frequently.

Explanation:

The Niger River Delta is a huge resource of crude oil that is presently producing around 2 million barrels of oil per day. The extraction activities in this area are not carried out using the best equipment that offer least spillage. Thus, oil spill incidents are frequently encountered in this region.

The primary case of Nigeria's water pollution would be oil spills.