Arrange these geographers by their birth years, earliest first:
(A) Alexander von Humboldt
(B) Carl Ritter
(C) Fred K. Schaefer
(D) Richard Hartshorne
1
B, A, C, D
2
A, B, D, C
3
B, A, D, C
4
A, C, B, D
Arrange these geographers by their birth years, earliest first:
(A) Alexander von Humboldt
(B) Carl Ritter
(C) Fred K. Schaefer
(D) Richard Hartshorne