Which sentence is most clearly written?

The second sentence is more clearly written because it specifically identifies the subject "prisoners," making it explicit who is receiving the basic necessities. This clarity helps the reader understand the context and the focus of the statement. In contrast, the first sentence uses a vague pronoun "they," which could lead to ambiguity about who is being referred to. The clarity provided in the second sentence enhances comprehension and ensures that the information conveyed is direct and easily understood by the reader.