Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
you may decline to renew at any time prior to the commencement of a renewal subscription . 

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