answer: (B) II. Spiders are powerless should a rockfall on them.
Explanation: The passage from the story claims that a spider's web would not be strong enough to hold a falling rock. which means that in the process its home would be demolished and would have to resort to making the web all over again.
(A) Spiders are considered to be errors of God's creation - This can not be correct, because spiders exist with a purpose.
(B) Spiders are powerless should a rockfall on them. - This option makes the most sense because it is stating a fact.
(C) Spiders are considered the lowest form of life and thus expendable
- This option does not prove any point or have any correlation towards nonbelievers being akin to spiders.