执行MOV AX，WDAT指令时，要使AX寄存器中内容为3412H，不能采用( )数据段定义。

A、DSEG SEGMENT WDAT EQU WORD PTR BDAT BDAT DB 12H，34H DSEG ENDS

B、DSEG SEGMENT BDAT DB 12H，34H WDAT = WORD PTR BDAT DSEG ENDS

C、DSEG SEGMENT WDAT EQU THISWORD BDAT DB 12H，34H DSEG ENDS

D、DSEG SEGMENT BDAT DB 12H，34H WDAT LABEL WORD DSEG ENDS