8) C

Sum of patient days over both years = 11549 + 30432 = 41,981 ≈ 42000
Expressing 42000 per 100,000 = 0.42
Number of cases over both years = 0 + 3 = 3 cases
Rate is calculated as number of cases per 100,000 patient days = 3/0.42 = 300/42 ≈ 7.15
Hence C is the answer.

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