What am I doing wrong? I'm trying to change all the t or f answers in my older quizzes so that players no longer have to type in "t or f or true or false". Yesterday when I edited a couple of t or f answers on my Life of Kenneth Grahame quiz so players wouldn't have to type in the answer, and saved it, it said both answers had errors. When I went back in on edit, I couldn't see anything wrong--and so I saved it again. This time, everything was fine--but I had to resubmit the quiz. I feel dunderheaded throwing the quiz back into the editors' laps when nothing's been changed.
I've edited several other older quizzes to get rid of the typing in the t or f answers--most of them save fine--but I've still had to resubmit a few.
Also, I've noticed that unless a FITB answer is really easy to spell and very obvious, the vast majority of players miss them. Can I just change these to either t or f or multiple choice?