The correct answer is A. Survival of the fittest
Step-by-step explanation:
"Survival of the fittest" was a term used by the English sociologist and biologist Herbert Spencer to describe the way natural selection occurs in human societies. This means, according to Spencer in human societies only the individuals that are fit or have both physical or genetical features to survive and reproduce prevail over time. In this way, according to Spencer's concept societies would change and improve over time as only those with high qualities such as intelligence will prosper while others would disappear. This idea derives from the proposal of Darwin about the evolution of species, although Spencer adapted it to human communities. Thus, the term Spencer use to refer to the process of evolution of societies was the Survival of the fittest.