I figure out that I ... my cell phone in the theather?

[Maggie]

Hi,guys

I figure out that I ____ my cell phone in the theather.
(A)left (B)had left (C)has left (D)had been left

The correct answer is (B),but my answer is (A).

Would you please tell me if I could choose (A)? If not,what's the reason?
Thanks a lot.

Maggie
_________________
In my view,the more mistakes someone else corrects me,the more I could learn.
And welcome to my blog: http://0rz.tw/793HL

[Maggie]

Sorry! I thought this was the section,English Vocabulary, Grammar and Idioms. But I was wrong. I don't know if I could delete this post myself.
_________________
In my view,the more mistakes someone else corrects me,the more I could learn.
And welcome to my blog: http://0rz.tw/793HL