|Question 2Verbal

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The Historical Dictionary of Science Fiction is a crowdsourced project started in 2001 by lexicographer Jesse Sheidlower to record terms that originated in science fiction. Volunteers share digitized excerpts from personal collections of sci-fi magazines not typically preserved in libraries—_____ that allow the earliest uses of phrases such as "warp speed" (1952) to be identified and added to the dictionary.
Which choice completes the text with the most logical and precise word or phrase?
justifications
A
contributions
B
resolutions
C
negotiations
D