Final answer:
Randy, who experienced severe childhood abuse, is most likely to be suffering from Post-traumatic stress disorder (PTSD), which matches her symptoms of anxiety and is a common long-term consequence of severe psychological trauma. The correct option is - B. Post-traumatic stress disorder.
Step-by-step explanation:
In the case of Randy, who experienced a horrific childhood involving physical, verbal, and sexual abuse, the anxiety-related disorder that would best apply is Post-traumatic stress disorder (PTSD). PTSD is an anxiety disorder characterized by chronic stress reactions, such as intrusive and painful memories, jumpiness, persistent negative emotional states, detachment from others, angry outbursts, and avoidance of reminders of the traumatic events.
Considering Randy's severe psychological trauma from childhood events, symptoms of anxiety she began experiencing years later align with the manifestations of PTSD, which is known for its long-term effects including flashbacks and other distressing symptoms associated with the recollection of trauma.