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Answer: No, it is not a run-on sentence</h3>
This is one full thought that doesn't run on for too long. The "overcome with joy" portion is the dependent clause that needs the other part "Mrs. Monroe told her husband the exciting news about her promotion" which is the independent clause. The independent clause could be its own sentence without the dependent clause, but not the other way around.
If you don't mind me asking, what are the following?
I think the correct answer from the choices listed above is option B. In-<span>text citations should be included within the body of your research paper in order to </span><span>make it easy for your audience to find the sources of your information. Hope this answers the question.</span>