Final answer:
Statement A most effectively captures the critical themes of 'Speak', emphasizing the protagonist's trauma and her journey toward expression.
Step-by-step explanation:
The proper thesis statement for Laurie Halse Anderson's 'Speak' that would encompass the core themes of the novel would ideally highlight the protagonist's personal trauma, the journey to recovery, and the essential role of self-expression. These elements are central to the novel's exploration of intense themes and the protagonist's quest to regain her voice after a traumatic event. Accordingly, Statement A) Laurie Halse Anderson's 'Speak' explores the impact of trauma on the protagonist's life and her journey toward finding her voice, encapsulates these themes effectively by emphasizing the protagonist's personal struggle with trauma and the eventual triumph in finding her voice.