Who witnessed Mary making the poppet in court?

The correct answer is Susanna Walcott because she plays a role in the court proceedings and is present when Mary Warren makes the poppet. In the context of "The Crucible," this moment is significant as it ties directly to the false accusations being made against Elizabeth Proctor. The poppet becomes evidence that Abigail Williams uses to further her own agenda and manipulate the situation to her advantage.

This detail is crucial in understanding the plot, as it illustrates how the characters' actions are interwoven and how even seemingly innocent events can be twisted to create grave consequences. Susanna's presence indicates the courtroom's atmosphere of scrutiny and judgment, where personal motivations and fear lead to dire outcomes. The other characters listed do not witness this crucial event, making Susanna's presence pivotal to the unfolding drama.