选出与音标内容相符的正确句子。

/ wen wi: ə'raɪvd ðer ɪk 'spresd ðeə 'ri:zn fɔr li:vŋ /

A、When we arrived, they explained their reason for leaving.

B、When we arrived, they expressed their reason for leaving.

C、When we arrived, they explored our reason for leaving.