|Question 18Verbal

Source Texts

Text
At 1,066 years old, RCH 3, a foxtail pine (Pinus balfouriana) located in the United States, is one of the oldest known trees in the world. With almost two millennia of climate data in its tree rings, a single tree like        claims dendrochronologist Valerie Trouet, can tell the history of the world.
Which choice completes the text so that it conforms to the conventions of Standard English?
this:
A
this;
B
this
C
this,
D