Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
9.6 if a guest suffers a travel issue pursuant to the guest refund policy , airbnb may determine , in its sole discretion , to refund the guest part or all of the total fees in accordance with the guest refund policy . 

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. OPTIONS: ["Contract by using", "Jurisdiction", "Arbitration", "Unilateral termination", "Unilateral change", "Choice of law", "Content removal", "Limitation of liability", "None"].