Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
```
some reasons for rejection can include : ( a ) we are unable to supply you with the service , for example because that item is no longer available or because of an error in the price at the point of sale ; ( b ) you do not live in a country or region from which the services may be purchased ; or ( c ) you order more than the permitted maximum number of services . 

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