Do as directed. Choose the correct option and write. Appalachian mountain region of U.S.A has dense population because-
Q.1 (B) (1) Do as directed. Choose the correct option and write. Appalachian mountain region of U.S.A has dense population because-
A. uneven physical condition
B. inaccessible mountainous region
C. development of iron-ore and coal mines
D. war-like condition