Answer: A is correct.
Explanation: Darwinism says that thare is an "evolutionary law" in nature according to which the fittest survives (because of the best adaptation to its surrrounding enviroment). Of course Darwin spoke especially about species. It is German Ernst Haeckel (19th century) who is considered founder of Social Darwinism ....he transferred Darwinian theses to social sciences, human societies believing that there is an inherent law in societies that ensured that "fittest" are those who pave the future.