While researching a topic, a student has taken the following notes:
- Conservation scientist Priya Shah studied whether silica-gel packets could help regulate humidity in museum display cases.
- Shah placed packets in 12 sealed tabletop display cases and left 12 otherwise identical cases without packets.
- All 24 cases were exposed to the same daily cycles of changing humidity.
- During the first day, average humidity in the packet-equipped cases remained within the target range for 19 of 24 hourly readings, compared with 8 of 24 readings in the other cases.
- By the fourth week, the packets were saturated, and the difference in humidity fluctuations between the two groups was no longer statistically significant.
- The study did not assess the cost and labor of regularly replacing packets or test their performance in full-size museum galleries.
The student wants to explain how the study supports a qualified claim about the usefulness of silica-gel packets for museum humidity control. Which choice most effectively uses relevant information from the notes to accomplish this goal?