The primary objective of introduction of the UCP is( )．

A．to improve language

B．to consolidate some contents

C．to clarify some context

D．to facilitate the flow of international trade

银行的存款人签发给收款人在同城范围内办理结算或委托开户银行将款项支付给收款人的票据是( )。

A．银行本票

B．支票

C．银行汇票

D．股票