What Was the Central Issue in CASE 15

What was the central issue in CASE 15.1 United States v.Hansen (2001) ?

A) Can bankruptcy exempt facilities from environmental responsibility under CWA?
B) How much environmental damage must take place before corporate officers and plant managers may be held guilty under the CWA,RCRA,and CERCLA?
C) When may the federal government refuse to allow the shutdown of a facility that is producing hazardous waste?
D) When may corporate officers and plant managers be held individually guilty as operators of a hazardous waste facility under the CWA,RCRA,and CERCLA?