The CERCLA regulatory scheme governing the clean up of facilities contaminated with hazardous substances $-$ which must be followed in order to ensure the financial liability of PRPs $-$ is called the $q,$

Select one:

a$.$ National Oil Pollution Elimination

b$.$ National Contingency Plan

c$.$ National Pollutant Discharge Elimination System

d$.$ National Emissions Standards for Hazardous Air Pollutants