All of the following stuff can help archaeologists to learn about contemporary society or ancient society except ______.

A．the proportion of materials which break down within landfills
B．how much people eat and drink in their daily lives
C．the fluids that leak out of MSW landfills
D．how to compose the landfill wasters

A．fresh garbage can't provide as much information as ancient garbage does
B．only the author himself can benefit most from refuse studies
C．the studies of the Garbage Project are much better than any other research into the behaviors of consumers
D．the Garbage Project mainly deals with newly discarded refuse