Final answer:
Emotional stress can be a cause of secondary amenorrhea, resulting in the absence of menstruation for three or more consecutive menstrual cycles.
Step-by-step explanation:
The most accurate statement made by the nursing students regarding the cause of secondary amenorrhea is that emotional stress can be a cause of this disorder. Secondary amenorrhea refers to the absence of menstruation for three or more consecutive menstrual cycles in women who have previously had regular periods. Emotional stress can disrupt the normal hormonal balance in the body, leading to changes in the menstrual cycle and the occurrence of secondary amenorrhea. Other factors that can cause secondary amenorrhea include certain medical conditions, hormonal imbalances, and extreme exercise or weight loss.