Deciding between C and D is HARD. D requires as many assumptions as C honestly. D requires assuming polishing to a degree far surpassing necessary for hunting purposes can equal household purposes, and that flints used for household purposes has nothing to do with aesthetic reasons. The only reason C is worse is because “display” is related to aesthetic reasons… I think this question is requiring testers to assume the same things the test makers did and have to share their brain by locating “display” in the answer and say “That’s related to aesthetic sense!” Not a good question imo

@MalloryAldridge Honestly I was caught up on the wording “initial failure” as well, but then all other answer choices need to be eliminated, so E is the closest to what I initially thought about alternative explanation.