—Hey, can I ask you a favor?

—Sure, ________

A．here you are.

B．just as I thought.

C．how is it going?

D．what can I do for you?

钡和钠相似，也能形成含O₂^2-离子的过氧化物，则下列叙述错误的是 [ ]

A．过氧化钡的化学式是Ba₂O₂

B．1mol过氧化钠或过氧化钡跟足量水反应都生成0．5mol氧气

C．过氧化钡是离子化合物

D．过氧化钠或过氧化钡都是强氧化剂