A dependent clause contains a subject and a verb but does not express a complete thought. In this case, 'When the Founding Fathers signed the Constitution' is the dependent clause because it cannot stand alone. The independent clause is 'Several ideas in the Constitution were new.' ;
The dependent clause is found in option A: 'When the Founding Fathers signed the Constitution,' because it does not express a complete thought. In contrast, option B is an independent clause that conveys a complete idea. Thus, option A is the answer to the question.
;