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: What is the current population of the state from which The Army of Georgia returned in mid-May? Passage:On May 10, United States President Andrew Johnson had declared that the rebellion and armed resistance was virtually at an end, and had made plans with government authorities for a formal review to honor the troops. One of his side goals was to change the mood of the capital, which was still in mourning following the assassination of United States President Abraham Lincoln a month before at Ford's Theater. Three of the leading Federal armies were close enough to participate in the procession. The Army of the Tennessee arrived via train. The Army of Georgia, also under the command of William T. Sherman, had just completed its Carolinas Campaign and had accepted the surrender of the largest remaining Confederate army, that of Joseph E. Johnston. It arrived from North Carolina in mid-May and camped around the capital city in various locations, across the Potomac River from the Army of the Potomac, fresh off its victories over Robert E. Lee in Virginia. It had arrived in Washington on May 12. Officers in the three armies who had not seen each other for some time (in some cases since before the war) communed and renewed acquaintances, while at times, the common infantrymen engaged in verbal sparring (and sometimes fisticuffs) in the town's taverns and bars over which army was superior. Sherman, concerned that his Westerners would not present as polished an image as the eastern army, drilled his forces and insisted that uniforms be cleaned, buttons and brass shined, and that bayonets glistened.
 Links: a. Campaign of the Carolinas b. President of the United States c. North Carolina d. North Carolina
answer:
c


question:
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
answer:
d


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Question: Who was the Los Angeles Skyhawks backup in 1976 before Marine Cano? Passage:In 1976, Cano signed with the Los Angeles Skyhawks of the American Soccer League. There, he was the backup to Brian Parkinson and helped the Skyhawks to the ASL championship title. In 1978, he moved to the Fort Lauderdale Strikers of the North American Soccer League. In 1979, he returned to the ASL with the California Sunshine. In 1980, he played for the Cleveland Cobras in the ASL. That fall, he signed with the Cleveland Force in the Major Indoor Soccer League. In 1985, he played for the independent Los Angeles United. In 1986, he moved to the Los Angeles Heat of the Western Soccer Alliance. He played for the Heat as a backup to David Vanole in 1987, then left the league. In 1990, he returned to the Heat, now playing in the American Professional Soccer League. He permanently retired from playing following that season.
 Links: a. Los Angeles Skyhawks b. American Soccer League (1933–83) c. Cleveland Cobras d. Western Soccer Alliance
answer:

a