Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you retain all rights to your content that you post to the fitbit service . 

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