Read this passage from "The Obligation to Endure": During the past quarter century this power has not only increased to one of disturbing magnitude but it has changed in character. The most alarming of all man's assaults upon the environment is the contamination of air, earth, rivers, and sea with dangerous and even lethal materials. This pollution is for the most part irrecoverable; the chain of evil it initiates not only in the world that must support life but in living tissues is for the most part irreversible. In this now universal contamination of the environment, chemicals are the sinister and little-recognized partners of radiation in changing the very nature of the world - the very nature of its life.
What is Carson's tone in this passage?
• A. Withdrawn and uncertain
• B. Frustrated and angry
• C. Awestruck and amazed
• D. Unbiased and clinical