instruction:
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.
question:
Question: In which country is the seaport city of Porto located where the wine received its name "port"? Passage:Port is produced from grapes grown and processed in the demarcated Douro region. The wine produced is then fortified by the addition of a neutral grape spirit known as aguardente to stop the fermentation, leaving residual sugar in the wine, and to boost the alcohol content. The fortification spirit is sometimes referred to as brandy but it bears little resemblance to commercial brandies. The wine is then stored and aged, often in barrels stored in a Lodge (meaning "cellar") as is the case in Vila Nova de Gaia, before being bottled. The wine received its name, "port", in the later half of the 17th century from the seaport city of Porto at the mouth of the Douro River, where much of the product was brought to market or for export to other countries in Europe. The Douro valley where port wine is produced was defined and established as a protected region, and the name Douro thus an official appellation, in 1756, making it the third oldest, after Chianti (1716) and Tokaj (1730).
 Links: a. Barrel b. Tokaji c. Vila Nova de Gaia d. Porto
answer:
d


question:
Question: Who was the leader of Hungary during the Hungarian Revolution of 1848? Passage:The last meetings had revealed the rising antagonism with Britain and France, especially on Italian unification, the right to self-determination and the Eastern Question. The Alliance is conventionally taken to have become defunct with Alexander's death in 1825. France ultimately went her separate way after the July Revolution of 1830, leaving the core of Russia, Austria and Prussia as Central-Eastern European block which once again congregated to suppress the Revolutions of 1848. The Austro-Russian alliance finally broke up in the Crimean War: though Russia had helped to completely destroy the Hungarian Revolution of 1848, Austria did not take any action to support her ally, declared herself neutral and even occupied the Wallachian and Moldavian lands on the Danube upon the Russian retreat in 1854. Thereafter, Austria remained isolated, which added to the loss of her leading role in the German lands, culminating in the defeat of the Austro-Prussian War in 1866.
 Links: a. Eastern Europe b. Hungarian Revolution of 1848 c. Danube d. Wallachia
answer:
b


question:
Question: In which country was Ariadne auf Naxos first presented? Passage:In 1926, the opera was first presented at the Salzburg Festival, staged by Lothar Wallerstein in Viennese settings, twice conducted by Clemens Krauss and once by Richard Strauss himself. Lotte Lehmann was Salzburg's first Ariadne. Wallerstein was also the stage director of the second Viennese production in 1935, with settings by Oskar Strnad and costumes by Ladislaus Czettel. Josef Krips conducted. There were 38 performances until September 1943. Three months later a new production by Heinz Arnold was presented, with settings by Wilhelm Reinking and conducted by Karl Böhm. The cast featured Maria Reining as Ariadne, Max Lorenz as Bacchus, Alda Noni as Zerbinetta, Irmgard Seefried as composer, Paul Schöffler as Musiklehrer, Erich Kunz as Harlekin and Emmy Loose as Najade. Due to the war this production could only be shown seven times.
 Links: a. Salzburg Festival b. Josef Krips c. Clemens Krauss d. Irmgard Seefried
answer:

a