判斷題6月的活?？礉q期權(quán)將于6月到期。

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2.單項選擇題如果投資者預期兩份合約之間的價差將收窄，他將啟動價差（）

A.selling the contract offered at the higher price and selling the contract offered at the lower price
B.buying the contract offered at the higher price and buying the contract offered at the lower price
C.buying the contract offered at the higher price and selling the contract offered at the lower price
D.以較高的價格出售合同，以較低的價格購買合同

5.單項選擇題下列各項都是期貨交易所的重要功能，但不包括（）

A.解決期貨交易會員公司之間的糾紛[單選題]*
B.為會員公司辦理期貨交易提供便利
C.規(guī)范期貨合約交易
D.抑制期貨價格上漲過高或下跌過低