Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you are responsible for all activity that occurs in association with your account . 

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