Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may not assign this agreement or your account without the prior written consent of linden lab . 

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