Which choice shows the correct use of a dash or dashes? A. The first—two years of my life were spent—in Germany my father was st
ationed there. B. The first two years—of—my life were spent in Germany my father was stationed there. C. The first two years of my life were—spent in Germany—my father was stationed there. D. The first two years of my life were spent in Germany—my father was stationed there.
The correct answer to the given question above is the content of "What Exactly Are Green House Gases". The author in the story "An Inconvenient Truth" uses the content of "What Exactly Are Green House Gases" to emphasize how humans can improve the atmosphere.
The correct answer is D. A prepositional phrase means that it starts with a preposition. And in these examples, D is the only one that starts with a preposition "on".