The giant sequoia (Sequoiadendron giganteum) known as D-23, located in the United States, was one of the oldest known trees in the world, at 3,075 years old. With over three millennia of climate data in its tree __________ single tree like this, claims dendrochronologist Valerie Trouet, can tell the history of the world.
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Verbal·Standard English Conventions·Boundaries
mediumWhich choice completes the text so that it conforms to the conventions of Standard English?
A
rings and a
B
rings, a
C
rings a
D
rings. A