Final answer:
A dependent clause is a group of words that contains a subject and a verb but does not express a complete thought, relying on an independent clause. The dependent clause in the options provided is 'When the Founding Fathers signed the Constitution.'
Explanation:
A dependent clause is a group of words that contains a subject and a verb but does not express a complete thought. It relies on an independent clause to form a complete sentence. In the given options, 'When the Founding Fathers signed the Constitution' is a dependent clause because it cannot stand alone as a complete sentence.
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