Many People Refer to Alfred Russel Wallace as the "Father

Many people refer to Alfred Russel Wallace as the "father of biogeography." Which of the following contributions led Wallace to achieve this title?

A) Wallace described the idea of evolution at the same time as Darwin.
B) Wallace had traveled around the world and collected specimens.
C) Wallace coined the term "survival of the fittest."
D) Wallace described a sharp line dividing Australian species from Asian species.
E) Wallace prompted Darwin to publish the book On the Origin of Species. Alfred Russel Wallace achieved the title "father of biogeography" due to his work in the Malay Archipelago, where he discovered the "line" that separated Australian species from Asian species inhabiting the islands.