Option a is correct: The passage mentions that substantial changes in lifestyle can reduce environmental or health problems, implying that prevention is possible.

The passage also suggests that individual choices can make a difference in health outcomes, indicating that investing in prevention may be more effective than spending on cure.

Option b is incorrect: The passage does not explicitly state that it is the government's responsibility to solve environmental and public health problems. It focuses more on individual choices and collective inertia.

Option c is incorrect: The passage implies that environmental problems can lead to health problems, suggesting that health may not be fully protected if environmental issues are left unattended.

Option d is incorrect: The passage does not specifically mention the loss of traditional lifestyle or the influence of western values as factors contributing to unhealthy ways of living. It primarily discusses the challenges of addressing environmental and health problems.

Possible Dispute:

As per Passage, option (c) looks like the better choice. However, if you will refer to the source of this passage, option (a) has directly been quoted from there. Though, if we just limit ourselves to the passage provided, option (c) sounds more logical.