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