Answer:
C
Explanation:
I might be wrong i think i am but if I were answering that then i would do C. sorry if its wrong
A flashback tells something from the past so the answer would have to be (A) this is because of the use of the word recall. In every other option the verb is present or future tense instead of past tense.
C - A library, online labrary databases, careful and evlauative internet serces, old newpapers, magazines and periodical publications are the BEST places to go and find resources.