The correct answer is D. Sigmund Freud
He was the creator of Psychoanalysis which was based around the subconscious and which sparked uncountable amounts of papers and books on the human mind. His work was continued and expanded by Jung. Marx, Einstein, and Heisenberg, dealt with other things such as physics, or in Marx's case political philosophy.
Cayman, Felicia.
MLA uses alphabetical order to sort citations, therefore Cayman would be first
Good Luck :)
Answer: The hike was insanely fun!
Explanation:
If we didn't have communication we probably would never have reached this point in civilization
