Respuesta :
The best fit for this question would be option A "Our new coach is an ex-teacher." A hyphen is a dash (-) that would go between two words to make them one word. In this case it would be ex-teacher since how ex isn't a word.
Hope this helps!
Hope this helps!
A. Our new coach is an ex-teacher.
A hyphen is needed between ex and teacher to show that the two go together as a hyphenated compound noun. Unlock does not require a hyphen because it uses a prefix. Option C does not use a hyphen correctly because there should not be a hyphen between the my and own. Also, one hundred does not need a hyphen. Only numbers from twenty-one through ninety-nine are hyphenated.