to survivE in thE intEnsE trADE CompEtition BEtwEEn CountriEs, wE must ______ thE quAlitiEs AnD vAriEtiEs oF proDuCts wE mAkE to thE worlD mArkEt DEmAnD.
A．improvE
B．EnhAnCE
C．guArAntEE
D．gEAr