Researchers hope to find clues about the A'mk peoples who lived in the Kaumpta region about one thousand years ago but who left few obvious traces. The researchers plan to hire the few remaining shamans of the modern-day indigenous people in Kaumpta, who are believed to be descended from the A'mk, to lead them to ancestral sites that may be the remains of A'mk buildings or ceremonial spaces. The shamans were taught the location of such sites as part of their traditional training as youths, and their knowledge of traditional Kaumpta customs may help determine the nature of any sites the researchers find.
Which of the following is an assumption on which the success of the plan depends?
A. The researchers have reliable evidence that the A'mk of one thousand years ago built important ceremonial spaces.
B. The shamans have a reasonably accurate memory of A'mk sites they learned about as youths.
C. Kaumpta shamans are generally held in high esteem for their traditional knowledge.
D. Modern technologies available to the researchers are likely to be able to find some A'mk sites easily.
E. Most or all A'mk sites are likely to be found within the Kaumpta region.
正确答案：B Evaluation of a Plan
Situation Researchers wish to find sites of an ancient people, the A'mk, who lived in the Kaumpta region one thousand years ago. Indigenous people believed to be descended from the A'mk live in that region today. Their shamans, as youths, were taught about such sites. To discover some of these sites, the researchers plan to hire the shamans.
Reasoning What must be true for the success of the researchers’ plan to find the sites by relying on the shamans’ assistance? The plan would fail, for example, if there were no such sites in the Kaumpta region. Therefore, the researchers’ plan depends on assuming that Kaumpta have some such sites—but not that most of the sites are there. The plan also requires that the shamans collectively have reasonably accurate recall of what they learned about the sites as youths.
Correct. If the shamans collectively have no “reasonably accurate memory” of what they learned of the location of such sites, then the researchers’ plan is not a useful one and can have no reasonable expectation of success.