The complex sentence is A. After Henry submitted his essay, he realized that he hadn't proofread the last page.
<u>A complex sentence is a sentence that contains an independent clause and a dependent clause</u>. In contrast to an independent clause, a dependent clause cannot stand alone to form a complete sentence. Moreover, dependent clauses are always introduced by a subordinating conjunction. In this sentence,<u> the dependent clause is "After Henry submitted his essay", the subordinating conjunction is "after" and the independent clause, which can stand by itself, is "he realized that he hadn't proofread the last page"</u>.
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A plot of a novel is an artificial ordering of events. The correct option among all the options that are given in the question is the third option or option "C". It is actually nothing but a fictitious prose narrative. I hope that this is the answer you were looking for and it has come to your help.
The answer is Thanksgiving and United :)
Taking the ice cream cone after buying it .