What are the answers choices??
Themselves
This reflexive pronoun is the best fit because it needs to agree with the antecedent--in this case "scholars". Because scholars is plural, the pronoun also needs to be plural. Themselves is a plural reflexive pronoun, so it will properly complete the sentence.
B. an original research report
What are the options on this. ???
The answer is B, because the word half-time is a compound word.
Hope this helps!