A) the most important elements of this image is the river in the foreground, the bridge in the middle and the smoke in the background
B) it looks like the bridge is made of woods. The background isn’t really clear, we just can see properly the smoke on the up right corner. The people are little, and it shows that they are not important for this paint, they are more like decoration.
C) the atmosphere looks sad and dark. It gives a negative image of the Industrial Age