A social science teacher could best use which of the following examples to illustrate the influence of mass media on public policy?

The example of a newspaper series on nursing homes followed by investigations and new regulations effectively illustrates the influence of mass media on public policy. This scenario showcases how investigative journalism can draw attention to important social issues, prompting government action. The publication of the newspaper series not only informs the public about potential problems in nursing homes but also highlights a significant function of the media as a watchdog that brings issues to light.

When mass media investigates and reports on specific topics, it can lead to public awareness and concern, which often pressures policymakers to respond. In this case, the media’s exposure of the conditions in nursing homes serves as a catalyst for investigations, demonstrating how journalism can directly impact public policy by leading to regulatory changes.

The other options, while they highlight different aspects of mass media, do not directly connect media influence to public policy as strongly as this example. For instance, a political candidate using social media emphasizes campaign strategy rather than public policy changes, and parents' complaints leading to a show cancellation reflects consumer influence more than policy impact. Similarly, televised town hall meetings might illustrate public engagement but do not ensure that policy changes will follow.