Today,many of the Old Dumps and Landfills from Past Decades

Today,many of the old dumps and landfills from past decades are now

A) festering sites of toxic waste that must be fenced off and restricted.
B) parks and recreational areas widely used by the public.
C) being mined for the resources that were buried over several decades.
D) deep depressions,resulting from the decay of most of the materials that were buried long ago.