The best example of an objective summary from the options provided is Option D, as it states facts related to the impacts of fast food mentioned in 'Fast Food Nation.'
An objective summary is a brief restatement of the main points of a text without the inclusion of opinions or biases. Among the options provided, Option D is the best example of an objective summary.
It states factual elements described in Eric Schlosser's 'Fast Food Nation,' mentioning the influence of fast food on America's landscape, small businesses, independent farmers, and the homogenization of people's taste.