【单选题】Each of the following sentences contains ONE mistake. Find it out and correct it. As soon as I stepped out of the room, I had found a bus rushing by.
A.
As soon as I stepped out of the room, I found a bus rushing by.
B.
As soon as I stepped out of the room, I have found a bus rushing by.
C.
As soon as I stepped out of the room, I find a bus rushing by.
D.
As soon as I stepped out of the room, I has found a bus rushing by.