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: Michael Phelps has spoken publicly about his DUI arrest last year for the first time in an interview. The Olympic champion - who has won a record 22 medals - said that in the days after he was arrested for driving drunk and speeding after a night out gambling he wanted to end his life. 'I was in a really dark place,' Phelps, 30, said in an interview with Sports Illustrated. 'Not wanting to be alive any more.' He was able to turn things around though thanks to his close relationship with his mother and sisters, a stint in rehab and help from two unlikely sources - his best friend and former football star Ray Lewis and his estranged father Michael Fred Phelps.Michael Phelps was arrested in September last year and charged with DUI after he was found to have a blood-alcohol level of .14'I was in a really dark place. Not wanting to be alive any more,' Phelps said in a new interview with Sports IllustratedFamily and friends, including Lewis, convinced Phelps, 30, to go to a treatment center in ArizonaPhelps spent 45 days in rehab, and during that time was able to improve his fractured relationship with his father FredAfter emerging from treatment, Phelps vowed to not drink alcohol until after the Rio Olympics in 2016 
 Question:That is when people began to discuss the possibility of _ checking into a treatment facility.

Michael Phelps