Read the following lines from the text:
The steamer slides through green and echoing reaches; past groups of totems standing like ghosts of the past among the dark spruce or ceder trees; through stone-walled canyons where the waters move dark and still; into open, sunlit seas.

What does the word reaches mean in this context?
A. Gloomy spaces
B. Mossy growths
C. Remote areas
D. Loud noises