Analyze the map below and answer the question that follows. A thematic map of East Asia. Climate regions are labeled 1, 2, 3, 4, 5, and 6. 1 is in southeastern China and southern Japan. 2 is in southwestern China. 3 is in Central China. 4 is in Northern China near the border of Russia. 5 is in northern China, Mongolia, and South Korea. 6 is in northeast China, North Korea, and Northern Japan.

The East Asian region labeled with the number 1 on the map above is the climate region.
A.
humid subtropical
B.
humid continental
C.
highland
D.
semiarid

Please select the best answer from the choices provided
A
B
C
D