9. In June, a manufacturer sold 4 copper futures contracts ( 25 tons/contract) with a price of $10000 per ton maturing in October. To prevent the price going upward, he decides to purchase 4 copper call option contracts with strike price of $9800 per ton maturing in October with premium of $300. When the option expired in October, the futures price increase to $11000 per ton. If the enterprise has executed the option and finally completed the delivery of four futures contracts in October. What' s the actual price (per ton) of copper sold by the manufacturer? (Please ignoring commission costs) A. 10000 B. 10300 C. 10900 D. 11000