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.

Q: 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 50.6 days and is used to treat bone cancer due to strontium's chemical similarity and hence ability to replace calcium. While Sr (half-life 28.90 years) 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 30,000 km 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

A: d
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Q: Question: What is the average temperature of the body of water where the frontal low developed? Passage:A tropical disturbance moved westward offshore Nicaragua and was declared Tropical Depression Twenty-Four on October 15.. During the early afternoon of the next day, ship reports indicated the formation of a tropical depression close to land. The cyclone moved at a quick pace towards the west-northwest south of a warm-core ridge. Early on the morning on October 16, Roslyn became a tropical storm. By the morning of the October 17, Roslyn had developed into a hurricane south of Acapulco. A vigorous upper trough was deepening offshore Baja California, and Roslyn began to re-curve within a few hundred miles of Manzanillo. The system struck Mazatlán as a marginal hurricane on October 20. The low-level center rapidly dissipated, although a frontal low developed in the western Gulf of Mexico, which moved over southeastern Texas and later through the Mississippi Valley. The original upper-level circulation maintained its northeast movement, bringing rainfall to the Southeastern United States.
 Links: a. Mazatlán b. Acapulco c. Nicaragua d. Gulf of Mexico

A: d
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Q: Question: Did the pop group that Foster was a keyboardist for have more than three members? Passage:Foster was a keyboardist for the pop group Skylark, discovered by Eirik Wangberg. The band's song "Wildflower" was a top ten hit in 1973. When the band disbanded, Foster remained in Los Angeles and together with Jay Graydon he formed the band Airplay, whose album of the same name is often labeled as important within the west coast AOR genre. In 1975, he played on George Harrison's album Extra Texture. He followed that up by playing the Fender Rhodes and clavinet on Harrison's album Thirty Three & 1/3 a year later. In 1976 Foster joined Guthrie Thomas on Thomas' second Capitol Records album, Lies and Alibis, with Ringo Starr and a host of many other famed performers. Foster was a major contributor to the 1979 Earth, Wind and Fire album I Am, as a studio player and arranger, as well as being a co-writer on six of the album's tracks. The most noteworthy being the song "After the Love Has Gone", for which Foster and his co-writers, Graydon and Bill Champlin, won the 1980 Grammy Award for Best R&B Song.
 Links: a. Skylark (Canadian band) b. Popular music c. Earth, Wind & Fire d. George Harrison

A:
a
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