A.
He told Mr Bingley about it, and he thought it was best for him.
B.
He did not tell Mr Bingley about it, because he thought it was best for Jane.
C.
He did not tell Mr Bingley about it, and he was not regretful for what he had done.
D.
He did not tell Mr Bingley about it, but he regreted doing so.