Reread these sentences from the passage. As peoples become a little less primitive, their industries, although in a rude manner, are extended to resources below the surface; then, with what we call civilization and the extension of knowledge, more resources come into use, industries are multiplied, and foresight begins to become a necessary and prominent factor in life.

How does Roosevelt use the rhetorical devise of enumeration to advance his purpose?
A) to show the different ways natural resources can be utilized
B) to explain how, as civilizations develop, they use more natural resources
C) to show that civilized people understand and use natural resources more efficiently
D) to explain that industry uses more natural resources than any other endeavor