Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
supercell reserves the right to terminate any account that has been inactive for 180 days . 

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