All of these factors influenced Darwin in his writing of the theory of evolution by natural selection EXCEPT one. Which factor did not influence Darwin's theory?
A) He was strongly against creationism and set out to disprove it.
B) He noticed similarities between animals and plants from different places in the world.
C) Another author, Alfred Wallace, was competing against him, largely writing the same theory.
D) He recognized similarities in Malthus's theory of food limitations and with the rules of nature.