Answer:
A "all this, the mysterious, far-reaching hair-line trail, the absence of sun from the sky, the tremendous cold, and the strangeness and weirdness of it all-made no impression on the man"
Step-by-step explanation:
The phrase from paragraph 3 that best demonstrates that the man does not seriously consider the potential dangers of nature is option A.
This is because, the man does not even consider the danger of the cold, absence of sun in the sky and how weird everything is.
He is just indifferent to it all.