I think that the awnser is : " B. Adverb" but not so sure
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>.
To gain
to vote
to speak
to pay
to see
to win
to achieve
to grant
to vote
to mint
to put
to honor
to gain
to have
here are the infinitive for each number
C+D because it makes the most sense.
