Answer: Only "She cannot do the work herself" is clearly intensive.
All the others are reflexive. The pronoun serves as a direct object that also refers to (reflects back on) the subject.
Explanation: A possible example for discussion:
The boys bought themselves lunch.
In this sentence, <em>themselves </em>is the indirect object (reflecting the subject) and it serves to mean that the boys bought their own lunch, So reflexive "as-is." If the word is moved to another position in the sentence, it could be intensive.
The boys themselves bought lunch. (Appositive) or The boys bought lunch themselves. In these cases, <em>themselves</em> would be intensive. The meaning changes. Maybe the boys bought lunch for others too. (Surprise! They did it themselves for other people.)
D because the sentence in the quote is a complete thought and ends with a "?"
Unlike A & B the sentence is divided between linking verbs.
<span>The largest library in the United States, located in Washington, D.C., and maintained largely by federal appropriations. Its original purpose was to provide research facilities for members of Congress; today it serves the public as well.</span>
