The president of the United States traveled to Asia to meet with Asian leaders. The president first met with officials in Vietnam and then traveled to South Korea. Which statement about the president's trip is correct?
A.
The president first visited the nation labeled numeral I before traveling to the nation labeled numeral III.
B.
The president first visited the nation labeled numeral II before traveling to the nation labeled numeral III.
C.
The president first visited the nation labeled numeral I before traveling to the nation labeled numeral IV.
D.
The president first visited the nation labeled numeral II before traveling to the nation labeled numeral IV.