THe answer is A. Themselves. A reflexive pronoun indicates that the person who is realizing the action of the verb is also the recipient of the action.
I think "that" is the adjective clause because you can remove it without ruining the sentence.
The story strongly suggest themes of human relationship and (possibly) a heist or job that seems to be involved.
I would say it is too wordy. Try breaking it into 2 sentences or combining them better.
An accurate description of the Oracle of Delphi a priestess who told the Persians to attack Greece by land. The correct answer is A.
