According to Cleanthes, the World and Every Part of It

According to Cleanthes, the world and every part of it is nothing but one great machine. "The curious adapting of means to ends, throughout all nature, resembles exactly, though it much exceeds, the productions of human contrivance; of human design, thought, wisdom, and intelligence. Since therefore the effects resemble each other, we are led to infer, by all the rules of analogy; By this argument a posteriori, and by this argument alone, do we prove at once the existence of a ..."

A) human life-force.
B) normative ethics.
C) law of nature.
D) deity.