What Best Describes the Problem Known as Saltwater Intrusion

Multiple Choice

What best describes the problem known as saltwater intrusion?

A) heavy pumping allows saline water to migrate into freshwater aquifers
B) disruption of marine ecosystems when freshwater discharges into the ocean
C) disposing wastewater from desalinization plants causes hypersaline seawater
D) injecting seawater into freshwater aquifers for treatment and storage
E) injecting freshwater into saline aquifers for treatment and storage