Answer:
C. To explain why the culture honors cattle.
She <span>had been working</span> on the project for 2 days before she finished it. So B is the only right one as it's a continuous action before an action with an exact defining past perfect continuous. Also there's a key word "for" that can help us to find out the tense.
I believe that the most fitting answer for this question would be Victor's curiosity and thirst for knowledge. Although this is typically seen as a positive characteristic, it ends up consuming Victor and contributing to his downfall. It leads to him creating his monster, which ultimately destroys him in the end. Hope this helps.
