In chapter 20 of the lightning theif, why is important that the furies witness percy’s battle

They witnessed the battle to see if Percy took lord hades helm of darkness

In the story of far Rosamon the Queen intends to kill Rosamond with

B. a toxic drink.

Explanation:

In the story of fair Rosamond, the Queen Driven by Jealousy approaches Rosamond and tells her that she has to die. In that scene, the Queen can choose the Draught she can use to achieve her murder. But instead of using the knife she picks the toxic drink and forces Rosamond to drink it. However, the story also says that no one really remembers and that she could only choose from a knife or bowl.