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.

Let me give you an example: Question: When did the operation during which the 704th dropped supplies to allied troops near Nijmegen begin? Passage: The group was occasionally diverted from strategic missions to carry out air support and interdiction missions. It supported Operation Overlord, the invasion of Normandy by attacking transportation targets, including bridges, along with airfields and strong points in France. On D Day, the squadron and the rest of the 446th Group led the first heavy bomber mission of the day. The 446th aided ground forces at Caen and Saint-Lôduring July by hitting bridges, gun batteries, and enemy troops. During Operation Market Garden, the attempt to seize a bridgehead across the Rhine in the Netherlands, the 704th dropped supplies to allied troops near Nijmegen. It struck lines of communications during the Battle of the Bulge. During Operation Varsity in March 1945, it supplied ground and airborne troops near Wesel. The squadron flew its last combat mission on 25 April 1945 against Salzburg, Austria. The group had flown 273 missions and had lost 58 aircraft during the war,
. Links: a. Allies of World War II b. Wesel c. Operation Market Garden d. Air Support.
The answer to this example can be: c
Here is why: The passage describes the 704th's actions during Operation Market Garden.

OK. solve this:
Question: Of the players from Sweden who won the Open, who was youngest when they won? Passage:Before this year, the tournament was won by a home favorite on several occasions: Guy Forget in 1996, Fabrice Santoro in 1999, Arnaud Clément in 2006, and Gilles Simon in 2007. The record for most titles is three, won by the Swiss player Marc Rosset in its first two years in 1993 and 1994, as well as in 2000; the Swedish player Thomas Enqvist also won three, in 1997, 1998, and 2002. It is also one of the few ATP tournaments to have been won only by European players, with France with five (Forget, Santoro, Clément, Simon, and this year's winner Jo-Wilfried Tsonga), Sweden with 4 (Enqvist, Joachim Johansson), Switzerland with four (Rosset, Roger Federer), Germany with one (Boris Becker), Russia with one (Yevgeny Kafelnikov), Slovakia with one (Dominik Hrbatý), and Great Britain with one (Andy Murray).
 Links: a. Dominik Hrbatý b. Joachim Johansson c. Jo-Wilfried Tsonga d. Andy Murray
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
b