Which of these is true for pain in endometriosis?

Dysmenorrhea in endometriosis is usually congestive type that stas prior to onset of menstruation. All endometriosis lesions are associated with pelvic pain including minimal to mild endometriosis. IN regards to option 'b' , dysmenorrhea is less frequent in women with 'only ovarian endometrioma' compared with other locations. A strong association is found between pelvic pain, dyspareunia and posterior cul-de-sac ( POD) lesions. Distribution of pain is usually variable but its mostly bilateral.