B. Melancholy menace
Good luck on the test :)
The answer that is a correctly punctuated compound sentence is, Technology changes quickly; what is up-to-date today is old-fashioned next month. The correct answer is option A. A compound sentence is a sentence with two independent clauses. These two independent clauses can be connected either by a comma and coordinating conjunction or a semicolon.
<em>The answer is C.</em> Because back in the old days the participates needed to be physical in order to work on an essay, Now you can do it easily by working on it at the same time on the same doc/essay.