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PASSAGE: Unfortunately, Libby's date ranges didn't match those archaeologists had already worked out on the basis of Egyptian dynastic records. Some means of correlating radiocarbon dates with known dates was necessary. Experts went back to an established method for dating wooden artifacts: dendrochronology. This involves using tree rings for mapping intervals of time. Working together, dendrochronologists and radiocarbon-dating experts analyzed thousands of wood samples from a long-lived species of tree, the bristlecone(2)(which shares some of its range with the Caledonian pine.) Each growth ring was overlapped with slightly older samples showing similar patterns of growth, to build up a tree-ring chart going back thousands of years. The dates obtained matched Libby's findings.
QUESTION: Should the portion in the parentheses be deleted?Why?(3pt)
The writer is considering deleting the phrase "which shares some of its range with the Caledonian pine" from the preceding sentence.
Should the phrase be kept or deleted?(2pt)
A) Kept, because it adds information about how common pine samples are.
B) Kept, because it helps explains how samples are overlapping.
C) Deleted, because it disrupts the description of dendrochronology.
D) Deleted, because the information is irrelevant.
Answers
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Answer:
D) Deleted , because the information is irrelevant
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