执行下列哪一条指令后，就能用条件转移指令判断AL和BL寄存器中的最高位是否相同？

A．TESTAL,BL

B．CMPAL,BL

C．ANDAL,BL

D．XORAL,BL

What does the term to navigate with caution mean?（）.

A.To navigate intentionally

B.To navigate intensely

C.To navigate carefully

D.To navigate completely