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.
I need more information, is there like a article or something?
The pep rally really heartened the team, who had suffered so many setbacks and challenges during the season that many were thinking of quitting.
To hearten means to give someone hope.
