下列反应的离子方程式书写正确的是 [ ]

A．钠和水反应  Na＋H₂O＝Na⁺＋OH^-＋H₂↑

B．盐酸与氢氧化钠溶液反应  H⁺＋OH^-＝H₂O

C．三氯化铁腐蚀印刷线路板  2Fe³⁺＋Cu＝2Fe²⁺＋Cu²⁺

D．盐酸与碳酸钙反应制备二氧化碳  CO₃^2-＋2H⁺＝CO₂↑＋H₂O

Man: I'm still waiting for my sister to come back and type the application letter for me.Woman: Why bother her I'll show you how to use the computer. It's quite easy.Question: What does the woman mean

A．She'll type the letter for the man.

B．She'll teach the man to operate the computer.

C．She doesn't think his sister is a good typist.

D．She thinks the man should buy a computer.