|Question 5Verbal

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Text
Established knowledge of prehistoric societies primarily stems from analysis of durable historical artifacts, including pieces of pottery, but Ruth Maicas Ramos 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 well-preserved organic 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?
It suggests that the researchers did not fully achieve a goal outlined earlier in the text.
A
It describes the uncertain nature of a discovery by the researchers mentioned earlier in the text.
B
It refers to a challenging situation presented earlier in the text.
C
It distinguishes between the two types of historical artifacts discussed earlier in the text.
D