Answer:
38 is no change and 39 is C ( hope this kinda helps)
Well if you are trying to speak Latin et al means “ and others “ but it could also be used to shorten lists of author names or making them simpler.
My sweet,quiet father surprised us with his outburst yesterday
Your only describing the father with 2 words. A comma is only necessary if you were using 3 words
is this a question from ur school?. if so this is something you should answer or ur own......