What is the runway designation for a runway with a magnetic heading of 276 degrees?

The runway designation for a runway is determined by its magnetic heading, rounded to the nearest ten degrees, and then the last digit is dropped. In this case, a magnetic heading of 276 degrees would round to 280 degrees when considering the nearest ten degrees. The last digit is dropped, resulting in the runway being designated as "Runway 28."

Thus, "Runway 28" is the correct designation as it accurately reflects the calculated heading derived from the magnetic orientation of the runway. The other options do not correlate with the magnetic heading of 276 degrees as they represent different headings that do not align with the rounding and designation process used in aviation.