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The text states that "it is important to note that while the study has shown a causal relationship, more research is needed." This means that

SAT · English · previous-year question

  1. A.the results of the study are not valid.
  2. B.further research may uncover additional information or factors that could affect the results.
  3. C.the study does not prove that there is a causal relationship.
  4. D.the study’s results cannot be applied to other contexts.

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