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) South Korean President Park Geun-hye will be investigated "as a suspect" in a growing political corruption scandal, prosecutors said on Sunday, as three people with ties to Park were officially indicted. But whatever their findings, Park will not be charged due to a law that makes the president immune from prosecution. South Korean prosecutors announced Sunday there was enough evidence charge Choi Soon-sil, a friend of the president, and former aides An Chong-bum and Chung Ho-sung. Lee Young-ryol, the prosecutor who led the corruption probe, said Choi and An are being charged with abuse of power, fraud and coercion. Chung faces charges related to leaking classified documents to Choi through email, phone and fax.President Park will be the first sitting South Korean leader to be investigatedA confidante and two former aides of Park's face corruption charges 
 Question:_ has ordered the resignation of 10 of her senior secretaries -- aides who coordinate policy -- as political turmoil gripped the country.

Park Geun