Arrange the following works that reflect the impact of Darwinian Theory on geographical thought in chronological order of their publication:
A. "The Origin of Species" by Charles Darwin
B. "Anthropogeography" by Friedrich Ratzel
C. "Principles of Human Geography" by Ellsworth Huntington
D. "The Geographic Pivot of History" by Halford Mackinder
1
A, B, D, C
2
A, B, C, D
3
B, A, D, C
4
C, B, A, D