The incorrect usage of the singular possessive is found in the following option:
A. Icarus's fate was sealed when he approached the sun.
The problem is that it should be "Icarus' " - if the word ends with "s", you just add the apostrophe, not an additional S. (actually this is disputed, but it's the only problematic option among the options given)
It’s like a whimsy side of someone’s personality/character
Having facts about the statement that help in your favor. Maybe from an expert or someone certified in whatever the claim is about.
Answer:
I think it's implying that if you want the reward your are going to have to go through challenges to get it