In Tierra Del Fuego, Darwin Speculated That "Nature by Making

In Tierra del Fuego, Darwin speculated that "Nature by making habit omnipotent, and its effects hereditary, has fitted the Fuegian to the climate and the productions of the miserable country." The significance of this statement is that it shows that

A) Darwin had the mechanism of evolution figured out in the early parts of the voyage of the Beagle
B) in his early thought, Darwin accepted the concept of the inheritance of acquired characteristics
C) Darwin was the first to elevate the importance of habit and this had a major impact on early psychology
D) it nicely summarizes the principle of natural selection