Final answer:
The finding that people often shared their copies of Gidra with others once they were done reading would most directly support the hypothesis that Gidra's influence extends beyond its monthly publication figures.
Step-by-step explanation:
To most directly support the student's hypothesis that Gidra's influence cannot be judged solely based on the number of newsletters published monthly, the finding that would provide the strongest support is (C) People would often give their copies of Gidra to others once they had finished reading an issue.
When looking at influence, the circulation of ideas and the reach beyond the initial distribution of the publication are key factors. If individuals were passing their copies around, this indicates that the newsletter's content had a significance that extended well beyond its print run, and it's reasonable to assume that the readership was larger than the 4,000 copies would suggest. Also, this practice might have facilitated community discussions and actions that were not measurable by publication quantities alone.