Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
15.2 you may terminate this agreement at any time via the `` cancel account '' feature on the airbnb platform or by sending us an email . 

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