A simple subject is probably the most basic unit in sentence construction. A subject is a noun, which is a person, place, thing, or idea. A subject tells us who or what the sentence is going to be about. Without a subject, we cannot have a complete sentence. A simple subject is a subject that has just one noun as the focus of the sentence. This means that only one noun does the action, or connects, to the verb of the sentence.
I believe the answer to be D. Substitute the underline sentence with the answer choices. D makes the most sense.
Answer:
He illustrates how the king is not living up to these expectations
Explanation:
I ent and read the declaration for the answer hope this helps