Nhận biết (M1)

Established knowledge of prehistoric societies primarily stems from analysis of durable historical artifacts, including stone tools, but Mercedes Murillo-Barroso and team have contributed new insights with a unique analysis of plant-based items. Plant-based artifacts, including straw baskets, are seldom studied due to their perishable nature. This relative scarcity made it all the more exciting when the team examined remains of artifacts discovered in a cave in Spain and determined that they dated even further back than previously thought.

Which choice best describes the function of the underlined portion in the text as a whole?

• A.

  It suggests that the researchers did not fully achieve a goal outlined earlier in the text.

• B.

  It describes the uncertain nature of a discovery by the researchers mentioned earlier in the text.

• C.

  It distinguishes between the two types of historical artifacts discussed earlier in the text.

• D.

  It refers to a challenging situation presented earlier in the text.