当汇入行在汇出行开立有往来帐户时,汇出行在信汇委托书或支付委托书上的头寸拨付指示为()
A、In cover,we have credited your a/c with us
B、In cover,please debit our a/c with you
C、In cover,we have authorized X bank to debit our a/c and credit your a/c with them
D、In cover, we have instructed X bank to remit to you.