The measurement of the countries' carbon stock through field surveys by has been unhelpful, because the officials don't make their countries' land holdings readily available for study.
An inference can be defined as an act through which a reader can deduce the meaning and message (information) that is associated with certain text in a passage, especially through induction.
In this scenario, we can infer and logically deduce that the author implied that the measurement of the countries' carbon stock through field surveys by has been unhelpful, because the officials don't make their countries' land holdings readily available for study.
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Complete Question:
The authors imply that the response of various officials to attempts to
measure their countries' carbon stock through field surveys has been:
A. unhelpful, because they fear that jobs for their countries' scientists will be lost.
B. helpful, because their countries have invested significantly in technology to allow studies to expand.
C. helpful, because their countries stand to benefit from universal carbon data that the studies will uncover.
D. unhelpful, because they do not make their countries' land holdings readily available for study.
