Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
airbnb may without restriction assign , transfer or delegate this agreement and any rights and obligations hereunder , at its sole discretion , with 30 days prior notice . 

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