Answer:
I am not sure of your choices, but he is very arrogant. Impervious means that she is unable to be affected by the spell. She is stubborn. Apollo has to "let it go" due to her not being affected by Cupid.
Explanation:
The god Apollo insulted Eros, AKA Cupid. Her father had to keep her safe from Cupid.
If the evidence is underlined, this Is saying it explains the correct answer.