Question: Which of the following directed Children of the Secret State about North Korea: Carla Garapedian or Ben Stiller?

Context paragraphs:
Communism in Korea: The Communist movement in Korea emerged as a political movement in the early 20th century.  Although the movement had a minor role in pre-war politics, the division between the communist North Korea and the anti-communist South Korea came to dominate Korean political life in the post-World War II era.  North Korea, officially the Democratic People's Republic of Korea, continues to be a Juche "socialist" state under the rule of the Workers Party of Korea.  In South Korea, communism remains illegal through the National Security Law.  Due to end of economic aid from Soviet Union after Dissolution of the Soviet Union in 1991 and impractical ideological application of Communist economy in North Korea over years of economic slowdown in 1980s and receding during 1990s, North Korea replaced Communism with Juche ideology in its 1992 and 1998 Constitutional revision for the personal cult of Kim's family dictatorship and (albeit reluctanly) opening of North Korean market economy reform, though it still remains a centrally planned economy with complete control of the state and agriculture with collectivized farms and state-funded education and healthcare.

Ben Stiller filmography: Ben Stiller is an American actor, comedian, director, producer and screenwriter.  The following is his complete filmography.  He has mostly appeared in comedy films.  Stiller is an Emmy Award winner for his directed, produced and written television show "The Ben Stiller Show".

New Zealand–North Korea relations: New Zealand–North Korea relations (Korean:뉴질랜드-조선민주주의인민공화국 관계) refers to international relations between New Zealand and North Korea.  Relations between the two countries have been almost non-existent since the division of Korea.  During the Korean War in the 1950s, New Zealand troops fought as part of the United Nations force that repelled the North Korean invasion of South Korea.  Since then, New Zealand and North Korea have had little contact, until July 2000 when North Korean Foreign Minister Paek Nam-sun and New Zealand Minister of Foreign Affairs Phil Goff met in Bangkok, leading to the establishment of diplomatic relations in March 2001.  The New Zealand ambassador to South Korea based in Seoul is also cross-accredited to North Korea.  In 2006, North Korea tested its first nuclear weapon, drawing criticism and suspension of relations by the New Zealand government, which holds a staunch anti-nuclear policy.  New Zealand began re-establishing formal relations in 2007, when the New Zealand Minister of Foreign Affairs Winston Peters visited Pyongyang on November 20 to discuss possible political and economic deals with North Korea, on the basis that it start dismantling its nuclear weapons facilities.

Ahn Chol: Ahn Chol (born 1971 or 1972) is a pseudonymous freelance journalist who shot the footage for the film "Children of the Secret State", a movie about the condition of orphans in North Korea.  He won the Rory Peck Award in 2001 for his work.

Ben Stiller: Benjamin Edward Meara Stiller (born November 30, 1965) is an American actor, comedian and filmmaker.  He is the son of veteran comedians and actors Jerry Stiller and Anne Meara.

Carla Garapedian: Carla Garapedian (Armenian: Քարլա Կարապետեան ) is a filmmaker, director, writer and broadcaster.  She directed "Children of the Secret State" about North Korea and was an anchor for BBC World News.  After leaving BBC World, she directed "Dying for the President"" about Chechnya, "Lifting the Veil," about women in Afghanistan, "Iran Undercover" ("Forbidden Iran" for PBS Frontline World) and "My Friend the Mercenary" about the coup in Equatorial Guinea.  Her feature, "Screamers," was theatrically released in the U.S. in December 2006 and early 2007, and was on "Newsweek's" pick of non-fiction films for 2006/7.  The Independent called it "powerful" and Larry King for CNN described it as "a brilliant film.  Everyone should see it."  The New York Times deemed it "invigorating and articulate," while the Los Angeles Times called it "eye-opening."  "Carla Garapedian is a screamer, too," said the Washington Post.

Tropic Thunder: Tropic Thunder is a 2008 satirical action comedy film directed by Ben Stiller.  Stiller, Jack Black and Robert Downey Jr. star as a group of prima donna actors who are making a fictional Vietnam War film.  When their frustrated director drops them in the middle of a jungle, they are forced to rely on their acting skills to survive the real action and danger.  The screenplay by Justin Theroux, Stiller, and Etan Cohen was from a story by Stiller and Theroux.  The film was produced by Stuart Cornfeld, Stiller and Eric McLeod for Red Hour Productions and DreamWorks Pictures as an international co-production between the United States, Germany, and the United Kingdom.

Iran–North Korea relations: Iran–North Korea relations (Korean: 이란-조선민주주의인민공화국 관계 ; Persian: روابط ایران و کره‌ی شمالی‎ ‎ ) are described as being positive by official news agencies of the two countries.  Diplomatic relations picked up following the Iranian Revolution in 1979 and the establishment of an Islamic Republic.  Iran and North Korea pledge cooperation in educational, scientific, and cultural spheres.  Some media reports claim this cooperation extends to nuclear cooperation, though official U.S. government publications and academic studies have disputed this.  The United States has been greatly concerned by North Korea's arms deals with Iran, which started during the 1980s with North Korea acting as a third party in arms deals between the Communist bloc and Iran, as well as selling domestically produced weapons to Iran, and North Korea continues selling missile to Iran.  North Korea and Iran are the remaining two members of George W. Bush's "Axis of evil", which has led to many of the concerns regarding Iran–North Korea relations.

Jerry Stiller: Gerald Isaac Stiller (born June 8, 1927) is an American comedian and actor.  He spent many years in the comedy team Stiller and Meara with his wife, Anne Meara.  He later played Frank Costanza on the NBC sitcom "Seinfeld" and Arthur Spooner on the CBS comedy series "The King of Queens".  Stiller and Meara are the parents of actor Ben Stiller, with whom Stiller co-starred in the films "Zoolander", "Heavyweights", "Hot Pursuit", "The Heartbreak Kid" and "Zoolander 2".  Stiller is known for his angry, yelling acting style.

Screamers (2006 film): Screamers is a 2006 documentary film directed by Carla Garapedian, conceived by Peter McAlevey and Garapedian and produced by McAlevey.  The film explores why genocides have occurred in modern day history and features talks from Serj Tankian, lead vocalist of the American alternative metal band System of a Down, whose grandfather is an Armenian Genocide survivor, as well as from human-rights activist, journalist, and professor, Samantha Power, as well as various other people involved with genocides in Rwanda and Darfur.  "Screamers" also examines genocide denial in current-day Turkey, and the neutral trend that the United States generally holds towards genocide.

Supporting paragraphs: Carla Garapedian Ben Stiller
Answer: Carla Garapedian