The best option that evaluates the ways in which public policy shaped attitudes toward smoking in the U.S. is:
PSAs and taxation reduced smoking rates, which led to a decline in the rates of smoking-related illnesses.
This response accurately reflects the impact of public policy initiatives, such as public service announcements (PSAs) and taxation on tobacco products, that have effectively contributed to a decrease in smoking rates and subsequently lowered the incidence of smoking-related illnesses.