Answer:
A) attached them to a sled which dragged along behind. The sled was without runners. It was made of stout birch-bark, and its full surface rested on the snow.
B. But there was lifE abroad in the land and defiant. Down the frozen waterway toiled a string of wolfish. dogs.
Step-by-step explanation:
The two lines or groups of lines that support the inference, "Leather harness was on the dogs, and leather traces" are options A and B.
This is because, they show evidence that the dogs made use of leather straps to control their movement.