)which sentence below shows correct use of em dashes?

by the end-of-the-story, no one could believe it the main-character, was dead.
by – the end of the story no one could believe it, the main – character was dead.
by the end of the story, no-one could believe it the main, character – was dead.
by the end of the story – no one could believe it – the main character was dead.

Based on this dictionary definition, which sentence correctly uses the wordbolm? balmbaminoun1 an oil or ointment used to smooth the skin2 something that is comforting or healingfrom middle english baume balsam from latin balsamumoa. the balm wind blew through the trees, swaying my hammock likea mother rooks a cradleob. when the child hurt his knee on the sidewalk, his mother balmedthe scrape with an adhesive bandage and a huoc. spending the day at the beach reading a good book can be a balmfor a troubled heartd. eating a don helistory test was just the balm that chelleneeded in order to have a relaxing weekend