medium · GMAT Verbal
A hospital's readmission rate is defined as the percentage of discharged patients who are readmitted within thirty days. A new care-coordination program was introduced only in the cardiology ward. In the year after the program began, cardiology's readmission rate fell, while every other ward's readmission rate stayed the same as the year before.
Which of the following can be most properly concluded from these statements?
- The care-coordination program was the sole and only cause of cardiology's drop in readmissions.
- Cardiology's thirty-day readmission rate did not rise in the year the new program began.
- The hospital's overall readmission rate across all wards combined declined that same year.
- Patients in wards lacking the program were readmitted at the same rate as cardiology patients.
- The program would also lower readmission rates if adopted in any other hospital ward.
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