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].

[Q]: Wisconsin's Republican governor Scott Walker became the 20th major party candidate for president on Monday with a speech that name-checked Planned Parenthood, the ISIS terror army, Hillary Clinton, Vladimir Putin and the Kohl's chain of department stores. The early GOP favorite has waited month after month to enter the race as others leaped in, but finally declared his availability for the White House in a suburb of Milwaukee. Walker cast himself as the economic and military heir to Ronald Reagan, and a hardscrabble survivor with a statewide record that, he says, can scale up to the size of a nation.Walker joins the fray with 14 other Republicans and five DemocratsPitches Kohl's Department Stores as a volume-pricing example of how the US tax code should reach more workers with lower ratesSlams Obama for 'leading from behind,' being weak on Iran and Russia, and failing to be a friend to IsraelPledges to repeal Obamacare and green-light the Keystone XL pipelineCasual Walker wore no necktie and spoke with a lapel microphone – reciting a memorized speech without a teleprompter – and enters the race in 2nd place in polls 
 Question:'We defunded _ and enacted pro-life legislation,' he said.
[A]: Planned Parenthood


[Q]: A Texas hunter who is paying $350,000 (£235,000) to shoot a Black Rhino in Africa has been granted permission to import the animal's carcass to the U.S. as a trophy. Corey Knowlton sparked fury among animal rights activists after bidding for the right to shoot the animal at an auction held by the Dallas Safari Club last year. After news of the auction broke Mr Knowlton received death threats and has had to hire a private security team. Trophy: Texas big game hunter Corey Knowlton has been granted permission to bring the carcass of a Black Rhino back to the U.S.Corey Knowlton won right to kill the animal at an auction last yearBut he was waiting for permission to bring the carcass back to the U.S.150,000 people signed petition demanding his request should be deniedNamibia sells small number of Rhino-hunting licences every yearMoney is used to fund anti-poaching efforts under controversial scheme 
 Question:Prior to _'s poaching boom in the 1960s, the country had around 70,000 black rhinos.
[A]: Namibia


[Q]: The gunman who killed nine people last week at an Oregon college shot himself in front of his classmates after being wounded by two hero cops. Also revealed on Wednesday was that Umpqua Community College shooter Christopher Harper-Mercer, 26, was discharged from the Army after attempting to commit suicide. Harper-Mercer was discharged after one month of basic training at Fort Jackson, in South Carolina, in 2008. The Wall Street Journal reports that the Army wouldn't disclose details of the 2008 suicide attempt but that it indicates Harper-Mercer was deeply troubled long before he opened fire on his classmates last Thursday.Christopher Harper-Mercer, 26, shot himself in a classroom after being wounded by two hero cops who opened fireHarper-Mercer was discharged from the Army in 2008 for trying to commit suicideTodd Spingath was one of two officers to take down Oregon shooterHis partner and fellow vet, Joe Kaney, was identified earlier this weekThe pair have been hailed for preventing further potential devastationThey rushed into Umpqua Community College five minutes after alert 
 Question:At a Wednesday news conference, authorities said that two police officers in plainclothes were the first to confront Harper-_ after he began shooting at his morning writing class.
[A]:
Mercer