Final answer:
Without context, the cause of Helen's action in attacking Martha with scissors can only be speculated as a strong emotional response; however, regarding the seven universal emotions, melancholy is not typically listed among them.
Step-by-step explanation:
You seem to be asking about an incident from a story or play in which a character named Helen attacks another character, Martha, with scissors. However, without the specific context or the name of the work of literature, it is difficult to ascertain the exact cause of Helen's actions. Nevertheless, in many literary works, such an action can be due to intense emotions such as fear, anger, frustration, or confusion. These emotions are often developed through the character's interactions and the situations they find themselves in.
Concerning the reference to the seven universal emotions described in "this chapter", without more context it is not possible to provide the correct answer. However, if we are referring to the commonly accepted seven universal emotions based on psychological research, they include happiness, sadness, fear, disgust, anger, surprise, and contempt. If these are indeed the emotions described, then option C, melancholy, would not be one of the seven universal emotions.