In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Example Input: Question: What was the time span between the release of Nue Propriété and Private Lessons? Passage:Lafosse studied at the IAD (Institut des arts de diffusion) at Louvain-la-Neuve between 1997 and 2001. His graduation film Tribu, a 24-minute short, won the best Belgian short subject category at the 2001 Namur Film Festival. His first full-length feature, Folie Privée (2004), won the FIPRESCI award at the Bratislava International Film Festival., and the semi-autobiographical Ça rend heureux (2006) took the Grand Prix at the 2007 Premiers Plans d'Angers festival. 2006 also saw the release of Nue Propriété, starring Isabelle Huppert and brothers Jérémie and Yannick Renier, which debuted at the Venice Film Festival where it was nominated for the Golden Lion and won a SIGNIS award. The film received the André Cavens Award for Best Film by the Belgian Film Critics Association (UCC). For his film Private Lessons (Élève libre), he was nominated for two Magritte Awards in the category of Best Director and Best Screenplay.
 Links: a. Jérémie Renier b. 63rd Venice International Film Festival c. Golden Lion d. Private Lessons (2008 film)
Example Output: d

Example Input: Question: How old was the commander in chief when he coordinated a massive anti-guerrilla operation? Passage:In 1970, 22-year-old Crespo had dropped out of IST and was eventually drafted into military service in the Portuguese Colonial War. He transferred to Mozambique where his military occupation was to check the cement cargoes from Beira to the Cahora Bassa Dam construction site, near Tete. Some time later, due to his good fluency in English, he was placed in the press office of Kaúlza de Arriaga, the commander in chief of the Portuguese Armed Forces in Mozambique, who had coordinated a massive anti-guerrilla operation against FRELIMO separatists in 1970 - the Gordian Knot Operation. While serving in the army, Crespo also entered the newly created School of Medicine of the University of Lourenço Marques where he would complete a number of academic disciplines but did not graduate. He also married Helen de Souza from Johannesburg, a South African woman with Portuguese ancestry who worked in genetics. After the Carnation Revolution left-leaning military coup at Lisbon in April 1974, fresh out of the troop, Crespo fled Mozambique for South Africa.
 Links: a. Portuguese Colonial War b. Tete, Mozambique c. Kaúlza de Arriaga d. Kaúlza de Arriaga
Example Output: c

Example Input: Question: How long had the USS Kitty Hawk been in existence for when the movie The Train was released? Passage:In an early example of guerrilla filmmaking, Frankenheimer photographed Martin Balsam being ferried out to the supercarrier USS Kitty Hawk, berthed at Naval Air Station North Island in San Diego (standing in for Gibraltar), without prior Defense Department permission. Frankenheimer needed a commanding figure to play Vice Admiral Farley C. Barnswell and asked his friend, well-known producer John Houseman to play him, to which he agreed, on condition that he have a fine bottle of wine (which is seen during the telephone scene), although he was uncredited for it. It was Houseman's American acting debut, and he would not appear onscreen again until his Oscar-winning role in The Paper Chase (1973). Frankenheimer also wanted a shot of Kirk Douglas entering the Pentagon, but could not get permission because of security considerations, so he rigged a movie camera in a parked station wagon to photograph Douglas walking up to the Pentagon. Douglas actually received salutes from military personnel inasmuch as he was wearing the uniform of a U.S. Marine Corps colonel. Several scenes, including one with nuns in the background, were shot inside Washington Dulles International Airport which had recently been built, and the production team were the first ever to film there. The alley and car park scene was shot in Hollywood, and other footage was shot in the Californian desert in 110 degree heat. The secret base and airstrip was specially built in the desert near Indio, California, and they borrowed an aircraft tail in one shot to make it look like a whole plane was off the picture. Originally the script had Lancaster die in a car crash at the end after hitting a bus, but finally this was edited out in favor of a small scene of him departing by taxi which was shot on a Sunday in Paris during production of The Train (1964).
 Links: a. Movie camera b. The Paper Chase (film) c. Indio, California d. USS Kitty Hawk (CV-63)
Example Output:
d