Choose the closest paraphrased version after the following sentence or the italicized part.
It [sleepiness] filled my brain like a cloud. I was going, going... （ ）
A.
Due to sleepiness, I was not aware that I had lost my sense of direction.
B.
I was almost overcome by sleepiness and would doze off any moment.
C.
I was trying hard to beat back sleepiness so that I could keep moving.
D.
Sleepiness made me relaxed, as if I were walking under a cloud.
正确答案是B