The Answer is C because
The agreement that divided Persia into three zones, a large Russian zone to the north, and two smaller zones, one which neither country dominated, and a British zone to the south. Afghanistan was less of a trade partner to Russia, but there were concerns about the border, in relation to crime, refugees and diseases.
I believe the answer would be A. tree ring patterns since it's taking evidence from the earth itself, which would make it more accurate
Continental polar............
Answer:
kinda of thinking its Grimke sisters.
Explanation: