某人外出做生意，给父母写了这样一封信：“儿的生活好痛苦也没有粮食多病少挣了很多钱。”父母接到信后，用了不同的标点符号来停顿，结果一个笑一个哭。

      读了后笑了，是因为这么读：                                                                                                   

We don't plan to go to the concert, and so they don't.

A．so do they

B．they don't too

C．neither don't they

D．they don't either