How do mental health professionals define panic disorder, which Renee is unlikely to have? 

a. Persistent, high levels of anxiety and excessive worry over many life circumstances that are difficult to control 

b. Intrusive, repetitive anxiety-producing thoughts or a strong need to perform acts to reduce anxiety 

c. Repeated experiences of intense fear accompanied by physical symptoms that the individual fears will recur 

d. A strong, persistent, unwarranted fear