8) C

We can safely use estimate values for this question.

Total number of offenders at the beginning fo the period = 42, 721 ≈ 43,000

Number of reoffenders at the end of the 9 year follow-up period = 74% of 43,000 = 31, 820

Number of reconvictions at the end of the period ≈ 1100 per 100 offenders

Number of reconvictions per offender = (43,000 ÷ 100) x 1100 = 473,000

Number of reconvictions per reoffender = (473,000 ÷ 31820) = 14.86

Since we have overestimated the values for offenders and number of reconvictions, we must round down now. This approximately gives us 14.3. So C is the answer.