Jonathan and Cindy were watching a reality competition show where one of the judges appeared to be of Asian descent. Cindy said, "I hate it when they have foreign judges on these shows. You can't understand it when they speak." Jonathan replied, "I wonder where he is from?" When the judge made his comments he spoke with a clearly Southern accent. When Jonathan wondered where the judge was from he was most likely referring to what?

a. The judge's nationality
b. The judge's region of the United States
c. The judge's linguistic abilities
d. The judge's city