easy · LSAT Logical Reasoning

If a student joins the debate club, that student will improve at public speaking. Sarah has improved at public speaking.

Which one of the following can be properly concluded from the statements above?

  1. Had Sarah not joined the debate club, her public speaking would not have improved.
  2. It cannot be determined from the information given whether Sarah joined the debate club.
  3. Sarah definitely joined the debate club.
  4. Sarah definitely did not join the debate club.
  5. Joining the debate club is the only reliable way for any student to improve at public speaking.

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