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: (CNN) Former Milwaukee County Sheriff David Clarke must revise his master's thesis or risk losing his degree in security studies from the Naval Postgraduate School, according to documents CNN's KFile obtained through a Freedom of Information Act request. The school arrived at its decision after a lengthy investigation triggered by a May CNN KFile report. The story revealed that Clarke's 2013 thesis, entitled "Making U.S. security and privacy rights compatible," contained language lifted from numerous sources, including multiple ACLU reports, the 9/11 Commission Report, The Washington Post, former President George W. Bush's book "Decision Points" and others. In all the instances KFile found, Clarke credited sources with a footnote but did not indicate with quotation marks that he was using the language verbatim.Clarke must revise his master's thesis or risk losing his degree in security studies from the Naval Postgraduate School.The school arrived at its decision after a lengthy investigation triggered by a May CNN KFile report. 
 Question:The _ removed Clarke's thesis from its website shortly after CNN's initial report.

Naval Postgraduate School