In the sentence below, does the word "that" modify a verb (alleged and argued, respectively)? If so, what is the name for that type of clause? Is it correct to think of them as adverbial clauses? One modifies what the defendant "alleged," and the other modifies what the defendant "argued." Feel free to state any other errors in the sentence.
The defendant alleged that the indictment had been dismissed and argued that the court lacked jurisdiction over the case.