消费者表customers（cid,cname,caddress,cgender）,cid是主键使用select…intooutfile语句导出customers表中消费者的地址为北京的数据，导出的字段中不包含地址，并且指定数据导出到C盘的BACKUP目录下一个名为backupfile.txt的文件中，要求字段值如果是字符则用双引号标注，字段值之间用逗号隔开，每行以问好为结束标志。正确的语句是（）。

A.SELECTcid,cname,cgenderFROMcustomersWHEREcaddress='北京'INTOOUTFILE‘C:/BACKUP/backupfile.txt'FIELDSTERMINATEDBY‘,'OPTIONALLYENCLOSEDBY‘”'LINESTERMINATEDBY‘?';B.SELECTcid,cname,cgenderFROMcustomersWHEREcaddress='北京'INTOOUTFILE‘C:/BACKUP/backupfile.txt'FIELDSTERMINATEDBY‘,'ENCLOSEDBY‘”'LINESTERMINATEDBY‘?';C.SELECTcid,cname,cgenderFROMcustomersWHEREcaddresslike'%北京%'INTOOUTFILE‘C:/BACKUP/backupfile.txt'FIELDSTERMINATEDBY‘,'OPTIONALLYENCLOSEDBY‘”'LINESTERMINATEDBY‘?';D.SELECTcid,cname,cgenderFROMcustomersWHEREcaddress='北京'INTOOUTFILE‘C:/BACKUP/backupfile.txt'FIELDSTERMINATEDBY‘,'ENCLOSEDBY‘”'LINESTERMINATEDBY‘?';