Which sentence is most clearly written?

The sentence that is most clearly written conveys its message directly and succinctly. It emphasizes that success in law enforcement depends heavily on two specific qualities: patience and persistence. The structure of the sentence is straightforward, presenting a clear cause-and-effect relationship.

In contrast, the first sentence, while also clear, uses a more abstract phrasing by stating that patience and persistence are "key traits" in achieving success. While it is effective, it may not be as direct and may require a bit more interpretation about what "key traits" implies compared to the straightforward assertion made in the second sentence. The second sentence prioritizes directness and clarity, making it easier for the reader to grasp the essential idea without additional inference.