When the seller receives the buyer’s counter-offer, and he finds some terms and conditions unacceptable to him, he will state his own opinions in a letter, which is called as _____。

Whenthesellerreceivesthebuyer’scounter-offer,andhefindssometermsandconditionsunacceptabletohim,hewillstatehisownopinionsinaletter,whichiscalledas_____。

A、bid
B、offer
C、inquiry
D、counter-counter-offer