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Verbal·Standard English Conventions·Form, Structure, and Sense

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Which choice completes the text so that it conforms to the conventions of Standard English?

Economic        historical economic data is pivotal to understanding the effects of various economic policies. These long-term records allow researchers to compare a nation’s economic conditions prior to a policy’s introduction with conditions that emerge years after implementation.

A

researcher’s access to nation’s

B

researchers access to nations’

C

researchers’ access to nations’

D

researchers access to nations