The correct answer is C. Testimonial Novel
Explanation:
Elena Poniatowska is a French-Mexican author known for different literary works in Spanish such as Massacre in Mexico that is originally called La Noche de Tatleloco or Strong is Silence which is titled in Spanish Fuerte es el Silencio. Additionally, most of Poniatowska's writings focused on including the testimonies or narratives of people about historical events and due to this Elena Poniatowska is known due to her Testimonial Novel that relies on the accounts of people. Thus, the writing of this author is called Testimonial Novel.
