This is a test of commonsense with single/multi-choices. Complete the next sentence:

As the dog continues walking down the sidewalk, he stops at every set of bricks and begin to smell around them. when

Available options: (A). he finally comes to the end of the path, the dog stops, shakes his head and walks back outside. (B). he finally comes to a pausing point, he approaches a small brick building to inspect what the building will look like and other approaches near the building. (C). the dog picks up the pace, the pedestrians begin to walk past him. (D). finished, the dog walks across the road and begins sniffing everything on the other side including grass, garbage bags, and the bottom of the doors.
The answer is:
(D).