Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A top celebrity PR agency has admitted that it doctored the Wikipedia page for Naomi Campbell to present her in a more flattering light. Sunshine Sachs said that it removed a description of the model's 1994 solo album ‘Babywoman’ on the online encyclopedia which said it was a ‘critical and commercial failure’. A Wikipedia user identified as an employee of the firm also took out the word ‘ill-fated’ to describe a restaurant chain she invested in. References to her past relationship with Mike Tyson were also removed, as was a mention about her convictions for assault. Sunshine Sachs was caught out by Wiki Strategies, a blog which investigates unethical practices on Wikipedia - which can be edited by anyone.PR agency Sunshine Sachs used 'reputation management tool's to improve Campbell's image onlineSachs employee Alexander De la Torre Bueno doctored Campbell's Wikipedia page and has had to post apology on siteHer past was made to look more positive by changing or removing words and moving information further down the page 
 Question:'However, in June of 2014 when _ changed its guidelines, the employee tasked with this job failed to add newly-implemented disclosure requirements regarding editing pages on a client’s behalf to all accounts used for this purpose by the firm.

Wikipedia