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.
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Question: How many people died in the incident that contaminated about 30,000 km? Passage:Natural strontium is a mixture of four stable isotopes: Sr, Sr, Sr, and Sr. Their abundance increases with increasing mass number and the heaviest, Sr, makes up about 82.6% of all natural strontium, though the abundance varies due to the production of radiogenic Sr as the daughter of long-lived beta-decaying Rb. Of the unstable isotopes, the primary decay mode of the isotopes lighter than Sr is electron capture or positron emission to isotopes of rubidium, and that of the isotopes heavier than Sr is electron emission to isotopes of yttrium. Of special note are Sr and Sr. The former has a half-life of 50.6days and is used to treat bone cancer due to strontium's chemical similarity and hence ability to replace calcium. While Sr (half-life 28.90years) has been used similarly, it is also an isotope of concern in fallout from nuclear weapons and nuclear accidents due to its production as a fission product. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukemia. The 1986 Chernobyl nuclear accident contaminated about 30,000km with greater than 10 kBq/m with Sr, which accounts for 5% of the core inventory of Sr.
Links: a. Rubidium b. Mass number c. Electron capture d. Chernobyl disaster
answer:
d

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Question: How many teams are in the leagues which compete for the cup annually? Passage:In 2002, the International Ice Hockey Federation (IIHF) announced that it would acknowledge the site of Victoria Rink with "a commemorative plaque or other historical site marker to remind the passers-by of the existence of the Victoria Skating Rink, the birthplace of organized hockey." The commemoration has been marked in two ways. On May 22, 2008, a commemorative plaque was dedicated at the nearby Centre Bell, along with a plaque honouring James Creighton. Further, the IIHF created the Victoria Cup, a trophy named for the arena, for whichalong with 1 million Swiss francsone National Hockey League team and the champion of the European Champions Hockey League play-off annually. The first Cup match was held in Berne, Switzerland on October 1, 2008 between the New York Rangers and the Metallurg Magnitogorsk. The next, and last, edition of the Victoria Cup was held in Zurich on September 29, 2009, between the ZSC Lions and the Chicago Blackhawks.
Links: a. National Hockey League b. Chicago Blackhawks c. National Hockey League d. ZSC Lions
answer:
a

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Question: Who won the American Revolutionary War? Passage:Lehi has a vision of the tree of life. Relating this vision to his children, he expounds on it by teaching about the Messiah, and that they need to be righteous. Nephi prays to the Lord for a similar vision and help understanding his father's vision. In his vision, Nephi sees the vision his father had described, and also given an explanation about its symbolism. Nephi is shown many past and future events, including the life of the Son of God. He also sees the civilizations of his descendants, the voyages of Columbus, the American Revolutionary War, the scattering of his descendants (the American Indians), the Book of Mormon, its translation by Joseph Smith, the restoration of God's church, continued revelation in the modern era, and the correction of biblical translation errors. Nephi sees apocalyptic events, but is forbidden to write about them because John the Apostle will write them in the Bible. Finally, Nephi sees the future generations of his descendants, and of his brothers Laman and Lemuel. Whereas his people will have the gospel, they will ultimately be destroyed for wickedness; however the children of his brothers will be raised without a knowledge of the gospel, survive to the modern era, and be taught by the gospel and the restored church.
Links: a. Christ (title) b. Genocide of indigenous peoples c. Nephites d. American Revolutionary War
answer:
d