Obama has made history by becoming the first African-American in American history. Obama was born in Hawaii on August 4, 1961. His parents didn't live together when he was two years old and later divorced. Obama grew up with his mother in Hawaii, and for a few years in Indonesia. Later, he moved to New York, where he graduated from Columbia University in 1983. Obama met his wife, Robinson, in June, 1989 and married her on October 3rd, 1992. The couple's first daughter was born in 1998, followed by a second daughter in 2001. Obama _ in January 20, 2009. However, just when he became the president, he had to face many serious challenges ---- two foreign wars, the climate change and what he had described as "the worst financial crisis   in a century". But Obama said that he himself had been ready to face these challenges. Obama's success is a true milestone. It speaks to the fact that in America you really do get a chance to do anything, if you have the talent and abilities and you work hard enough. According to the passage, Obama had to face the following challenges except for   _  .
the climate change the financial crisis the population problem foreign wars