A.無(wú)差異性營(yíng)銷(xiāo)戰(zhàn)略 B.差異性營(yíng)銷(xiāo)戰(zhàn)略 C.集中性營(yíng)銷(xiāo)戰(zhàn)略 D.大眾營(yíng)銷(xiāo)戰(zhàn)略