I would say D. I know it looks weird, but that doesn't have anything to do with it. There needs to be a period after Friday because it is abbreviated, and there also needs to be a comma after Friday because a month comes next. There also needs to be a period after October because it is abbreviated. And then there is a period after 12 because it's the end of the sentence.
The stage<span> of launching adult children begins when your first child leaves home and ends with the "</span>empty nest<span>."</span>
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The answer is a I’ve done it before