medium · LSAT Logical Reasoning
A moon's geyser erupts every 18 hours unless a nearby moon passes within a specified distance, in which case that eruption is delayed but not skipped. During a 90-hour interval, exactly four eruptions occurred, the first at hour 0 and the fourth at hour 72. No eruption occurred between hours 35 and 55.
Which one of the following is most strongly supported by the information above?
- Exactly one of the three intervals between the four eruptions exceeded 18 hours.
- A close pass must have occurred during the no-eruption interval from hour 35 through hour 55.
- The second eruption occurred at hour 18.
- At least one eruption interval during the period was longer than 18 hours.
- The eruption ordinarily due at hour 54 was the only eruption delayed during the interval.
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