This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Which one of the following is an environmental factor associated with mental illness?a)  Emotional stressb)  Frustrationc)  Broken homed)  Anxiety 
Select and explain. 
A. abc, B. acd, C. bcd, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Causes of mental ill health                                                                            

Organic conditions → Cerebral atherosclerosis, neoplasm, endocrine diseases, metabolic diseases, chronic diseases (TB, Leprosy).
Heredity
Social-environmental factors → Worries, anxieties, emotional stress, tension, frustration, unhappy marriages, broken home, poverty, industrialization, urbanization, population mobility, cruelty, rejection, neglect, economic insecurity etc.