Answer: The right answer is the D. It introduces the conflict.
Explanation: Just to elaborate a little on the answer, it can be added that this excerpt is important because it is possible to infer that a troubling and significant scene, possibly an accident, has just happened. The trash collector had just being absorbed in his thoughts, and he was about to resume his duties when a flash, possibly from a vehicle, fell on him, and took from him "what the morning had offered"—the chance to have some time, perhaps just a few minutes, to be immersed in his thoughts.
Read the following excerpt from Leslie Marmon Silko's story The Man to Send Rain Clouds. His fingers were stiff, and it took him a long time to twist the lid off the holy water. Drops of water fell on the red blanket and soaked into dark icy spots.
