Your answer is D, "I was not always the very best student that I could be when I was in high school, and certainly not when I was in middle school".
The correct answer is D. A concrete example is one that provides a clear situation in which the abstract idea, in this case the author's argument, is exemplified. This option not only prepares the reader for the example, but also gives specific details about what could be regulated.
Answer:
A noun clause is a "Dependent clause" that does not modify a noun or a pronoun.
Also known as a Subordinate Clause.
Explanation:
For Example;
Zunaira's friends didn't now that she couldn't sing.