A person invested an amount in a bank at a certain rate and for a certain period, and his interest amounted to 9 dinars, and if the amount decreased by 60 dinars, his interest would be reduced by 1.8 dinars ، If the rate increased by 1.5%, the interest would increase by 3 dinars. Thus, the period for which the amount was invested is??  A - 1 year  B - 9 months  C - 8 months  D- 1.5 years

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