Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
parties retain the right to seek relief in small claims court for certain claims , at their option ; 

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