Identify the unfair aspect with respect to the sentence extracted from an online Terms of Service:
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in addition , the look and feel of this website , including all page headers , custom graphics , button icons and scripts , is the service mark , trademark and/or trade dress of tripadvisor and may not be copied , imitated or used , in whole or in part , without the prior written permission of tripadvisor . 

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