The previous question says “the authors imply that the response of various officials to attempts to measure their countries’ carbon stock through field surveys has been...” The answer to that one was “unhelpful, because they do not make their countries’ land holdings readily available for study.” Which choice provides the best evidence for the answer to the previous question?
A
lines 57-59 ("Due... Earth")
B
lines 60-61 ("The surveys ... spaced")
C
lines 61-63 ("And... secret")
D
lines 63-66 ("Satellite... future")