He established the United States Postal Service in the first city hospital in America.

What is the role of the sentence?
It is a summarizing sentence
It is an example that serves as a supporting detail
It is the topic sentence
It is a statistic that serves as a supporting detail

The role of the sentence is to provide a supporting detail.

The role of the sentence is to provide a specific example that serves as a supporting detail.

From the given options, it appears that this sentence does not fit into any of the provided categories. It does not serve as a summarizing sentence, as it does not provide an overview or conclusion of a larger piece of information. It is not an example that serves as a supporting detail, as it does not provide evidence or further explanation for a previous statement. It is not a topic sentence, as it does not introduce or summarize the main idea of a paragraph. Lastly, it is not a statistic, as it does not present numerical data or information.