Final answer:
The correct theory that suggests society and human behavior follow natural selection principles similar to those in plants and animals is D. Social Darwinism, which has been critiqued for promoting unjust social practices. (option d)
Step-by-step explanation:
The theory that people and societies are guided by the same principle of natural selection that determines evolution for animals and plants is known as Social Darwinism. This theory suggests that social order is accounted for as the product of natural selection, where being strong leads to success and survival while being weak leads to failure and disappearance.
However, this theory has been widely criticized for justifying unethical practices like imperialism, racism, and social inequality and for misunderstanding the scientific theory of natural selection as proposed by Charles Darwin.
The correct answer is D. Social Darwinism.