Ok so please don't completely trust my answer as i might not know what im talking about.
Piggy's death in TLOTF as well as the destruction of the conch is hugely significant as it symbolizes the death of a voice of reason. Throughout the book piggy took the practical side to things. Often siting the most logical ways and solutions to problems while the conch acted as a cornerstone of control. It was there to keep order and reason.
The answer is D.
