Many breeds of dogs are used for work. In many cultures dogs are used to herd sheep. The dogs keep the flock from being attacked by animals such as wolves. They also keep sheep from wandering off. Sheepdogs are known for their loyalty and gentleness. Based on your reading of the text, you can INFER that:

What effect has mass media had on obesity in the united states a. television commercials and programs have promoted increased acceptance of obesity b. public service announcements have halted the increase in obesity c. educational documentaries have caused obesity in the united states to fall d. advertisments for unhealthy foods have encouraged obesity