The professor seemed very self-assured, but the students were afraid he would resign, which is why they re-signed the petition to investigate the falseallegations made against him, is your answer.
Hope that helps, if it does mark me brainiest, if it doesn't please don't! :)
Cambridge English Dictionary defines hyphen as " the symbol -, used to join two words together, or to show that a word has been divided into two parts at the end of one line and the beginning of the next".
The correct answer, with all the hyphens in the right places, is :
The professor seemed very self-assured, but the students were afraid he would resign, which is why they re-signed the petition to investigate the false allegations made against him.
APEX answer would be " And, if they lived before the Christian era, / They did not worship god i the right way: / And i myself [Virgil] am one of those poor souls." (Canto IV, lines 34 - 39)