Which sentence does not contain any punctuation errors?
AThinking about it now, I realize that I was wrong.
BThinking about it now I realize, that I was wrong.
CThinking about it now I realize that I was wrong.
DThinking, about it now, I realize that I was wrong.
AThinking about it now, I realize that I was wrong.
BThinking about it now I realize, that I was wrong.
CThinking about it now I realize that I was wrong.
DThinking, about it now, I realize that I was wrong.