Nina, a 25-year-old, is arrested for killing her sister. She lacks the ability to understand the nature of the criminal charges against her due to a mental illness. She also lacks the capacity to consult with a lawyer to prepare her own defense. Which of the following statements is most likely true of Nina in this case? A. Nina is incompetent to stand trial as she lacks the ability to understand the nature of the criminal charges against her. B. Nina's competency to stand trial should be focused on her condition at the time of her crime, rather than at the time of her trial. C. Nina is competent to stand trial and can protect herself against criminal charges through infancy defense. D. Nina's competency to stand trial can be established by using immaturity defense