C. "During the construction of the amphitheater some formwork was accidentally moved before the concrete in the vault had completely set, killing twenty-five slaves, their foreman, and a senator observing the work from the ground." D. "Stables and storerooms around the central courtyard were also rented out."
I believe the answer is B :)
Answer: I'd say a. melancholy, b/c it seems the girl is sad