The most accurate response to how changes in public policy have affected smoking is:
The dangers of smoking are well known by most people.
This reflects the impact of public health campaigns, legislation, and regulations that have educated the public about the health risks associated with smoking, leading to a decline in smoking rates over the years. Changes such as increased taxation, smoking bans in public places, and graphic warning labels have all contributed to a greater awareness of the dangers of smoking. The other statements provided may not accurately reflect the current legal frameworks or public understanding of smoking-related risks.