YOU SAID:
How possible was that?
INTO JAPANESE
それはどのように可能でしたか?
BACK INTO ENGLISH
How was that possible?
INTO JAPANESE
それはどうして可能だったのですか?
BACK INTO ENGLISH
Why was that possible?
INTO JAPANESE
なぜそれが可能だったのですか?
BACK INTO ENGLISH
Why was that possible?
Come on, you can do better than that.