The manager,__________it clear to us that he disagreed with us, left the meeting.
(A)who has made
The answer is option D. Is option B also acceptable?
I could have written either of those posts, they run so parallel to my thoughts.
I too had chosen B before I got to the end, and then thought "well, if he slammed the door on the way out, without saying a word, I guess that's making his point as well."
So assuming he didn't exhibit childish door-slamming behavior, I'd say B is the best choice, with D a very real possibility.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.