Read an excerpt from the Nobel Lecture by AI Gore: We, the human species, are confronting a planetary emergency a threat to the survival of our civilization that is gathering ominous and destructive potential even as we gather here. But there is hopeful news as well: we have the ability to solve this crisis and avoid the worst- though not all of its consequences, if we act boldly, decisively and quickly. How does this exXcerpt develop Gore's theme that climate change is a problem that must be addressed? A. By listing groups that support action
B. By describing concrete solutions to the problemn
C. By creating a sense of urgency
D. By providing scientific evidence to support his claim