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

A．is humorous because it is ridiculous to search the refuse
B．is based on a serious rationale and it is just what the archaeologists have done
C．is just a guess for it is impossible for archaeologists to do such a thing
D．is interesting because archaeologists can't learn anything while doing so

A．the former records data more excruciatingly than the latter does
B．the data collected by the latter are biased by perceptions and judgements
C．the former collects data from self-reports or interview surveys
D．the former reconstructs consumer behaviors directly from material reality