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: The Transportation Security Administration will 'enhance' officer training for hair pat-downs after complaints that African-American women were being racially targeted for unnecessary screenings. New training will commence at Los Angeles International Airport, one of the airports named in the complaint filed by the American Civil Liberties Union. The complaint was filed on behalf of Malaika Singleton, who said she was subjected to a hair pat-down with weeks of each other while traveling from Los Angeles to London in December 2013. The Transportation Security Administration will 'enhance' officer training for hair pat-downs after complaints that African-American women were being racially targeted for unnecessary screenings (file photo)TSA agreed to make changes after ACLU filed official complaintTraining will begin at Los Angeles International AirportTSA also told ACLU the new training will stress 'race neutrality' and will emphasize 'hair pat-downs of African-American female travelers'Agency said they will also track down pat-down complaints filed by African-American women to assess if discrimination is occurring at specific airportsIn 2012 Solange Knowles claimed she had been racially targeted for a pat-down because she wore her hair in the Afro style 
 Question:But _ said it was these kinds of 'subjective rules' that made the agency more susceptible to 'unconsciously interpret the circumstances in a way that is consistent with racial stereotypes'.

American Civil Liberties Union