Passage Summary: People who used to sleep less than six hours but switched to eight hours usually feel less stressed, so the author thinks most short sleepers could lower their stress by sleeping more.

Conclusion: Most people who sleep very little can likely reduce their anxiety by increasing their sleep to at least eight hours.

Reasoning: Observation shows that individuals who transitioned from short sleep to long sleep typically experienced a decrease in anxiety levels.

Analysis: The argument moves from an observed correlation—a change in sleep leading to a change in anxiety—to a general recommendation for a population. We are looking for a structure where a specific observed change in a group is used to predict a similar outcome for others in that group. Note the shift from 'typically' in the premise to 'probably' in the conclusion, which maintains a consistent level of probability that you should match in the correct answer.