American writing of the mid-twentieth century vary from American writing of the nineteenth century covers an expansive scope of subjects from various givers.
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Answer:
Hello,
I say A, would be the answer, because someone else is saying "Open your mouth wide for the dentist." This dialogue, not a sentence because someone is saying it.
Therefore, the answer is A, Open your mouth wide for the dentist.
Hope this helps! :)
-<em>Fishylikeswater</em>