Explanation:
* U.S. is the correct abbreviation for "United States" in this context.
* The abbreviation is capitalized and followed by a period.
* The sentence is grammatically correct and clear.
Here are some other examples of correctly used abbreviations:
* Dr. Jones is a well-respected physician. (Dr. is the abbreviation for "Doctor")
* The company's CEO will be speaking at the conference. (CEO is the abbreviation for "Chief Executive Officer")
* I'll be back in a few mins. (mins is the abbreviation for "minutes")