Social experts point out that people who stay in nuclear families feel more aloof and lonely and are not able to cope with stressful situations of modern life and, in extreme cases, it leads to spontaneous drastic reactions like suicides and even murders.

The given passage discusses how people living in nuclear families often experience feelings of loneliness and aloofness, making it difficult for them to cope with the stresses of modern life. In extreme cases, this inability to manage stress can lead to drastic actions such as suicides or even murders. Since the statement is presented as an observation by social experts, the ideal summary should reflect their perspective without adding any prescriptive or overly deterministic language. Option C does a good job at this. 

Option A is too direct and presents a strong causal relationship by implying that staying in a nuclear family inevitably leads to extreme outcomes, which is not what the original passage suggests. Option D also suffers from an exaggerated cause-and-effect relationship: it suggests that nuclear families directly result in such extreme reactions. On the other hand, Option B seems prescriptive: it advises against nuclear families rather than simply summarizing the given idea.

Hence, Option C is the best summary.