What act demonstrated Constance's loyalty to the team?

Constance's loyalty to the team is demonstrated when she eats a piece of licorice from Kate's foot to keep a secret. This act shows not only her willingness to put herself in an unpleasant situation for the benefit of the group but also highlights the strong bond and trust she has formed with her teammates. By choosing to go through with this action, Constance prioritizes the team's cohesion and secrecy over her own comfort, illustrating the depth of her commitment to her friends and their shared mission.

The other options do show loyalty in different ways, but they do not evoke the same level of personal sacrifice or commitment that Constance's action represents. Sharing notes or standing up to Mr. Curtain reflect supportive behaviors, yet they do not capture the same kind of personal sacrifice and willingness to endure discomfort for the sake of the group's well-being that eating the licorice does. Similarly, sacrificing a chance at freedom is a significant act, but it does not involve the same immediate, tangible demonstration of loyalty that occurs in the moment with the licorice.