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.

Example Input: Question: When did the war end that brought the inhabitants of New Mexico under the governance of the United States? Passage:Hispanos identify strongly with their Spanish heritage and most are also mestizos of mixed Apache, Comanche, Pueblo, Navajo, Native Mexican, and Genízaro ancestry. Exact numbers for the population size of New Mexican Hispanos is difficult, as many also identify with Chicano and Mexican-American movements. For most of its modern history, New Mexico existed on the periphery of the Spanish empire from 1598 until 1821 and later Mexico (1821–1848), but was dominated by Comancheria politically and economically from the 1750s to 1850s. Due to the Comanche, contact with the rest of Spanish America was limited, and New Mexican Spanish developed closer trading links with the Comanche than the rest of New Spain. In the meantime, some Spanish colonists coexisted with and intermarried with Puebloan peoples and Navajos, enemies of the Comanche. New Mexicans of all ethnicities were commonly enslaved by the Comanche and Apache of Apacheria, while Native New Mexicans were commonly enslaved and adopted Spanish language and culture. These Genízaros served as house servants, sheep herders, and in other capacities in New Mexico including what is known today as Southern Colorado well into the 1800s. By the late 18th century, Genízaros and their descendants, often referred to as Coyotes, comprised nearly one-third of the entire population of New Mexico. After the Mexican–American War, New Mexico and all its inhabitants came under the governance of the English-speaking United States, and for the next hundred years, English-speakers increased in number. By the 1980s, more and more Hispanos were using English instead of New Mexican Spanish at home.
 Links: a. Mexican–American War b. New Spain c. Apache d. Genízaro
Example Output: a

Example Input: Question: What was the final score in the loss to the Houston Rockets on March 30? Passage:On December 8, 2017, the Phoenix Suns signed House to a two-way contract with the team. Throughout the rest of the season, House would split his playing time there between Phoenix and their NBA G League squad, the Northern Arizona Suns. House would make his debut with the team a day later, scoring two points and recording a single rebound in 11 minutes of play in a close loss against the San Antonio Spurs. On December 16, House would score a season-high 8 points in 15 minutes of playing time in a 108–106 win over the Minnesota Timberwolves. House was later assigned to the Northern Arizona Suns affiliate alongside Davon Reed on December 28, mainly for healing purposes. House then returned to action on January 5, 2018, recording what was at the time a new season-high 9 points in a loss against the San Antonio Spurs. On February 23, his two-way contract expired, meaning he couldn't be allowed to play for Phoenix again until after the NBA G League's first season under its rebranded name concluded. Once that happened, he was allowed to return to Phoenix for the rest of the season. On March 30, House recorded a career-high 8 rebounds in a heartbreaking, buzzer-beating loss against the Houston Rockets. On April 1, House would record a new season-high with 16 points scored alongside 6 rebounds and 3 assists in a 117–107 loss against the Golden State Warriors. Two days later, House recorded 14 points, 6 rebounds, and a career-high 5 assists in a 97–94 win against the Sacramento Kings. On April 6, House would put up his first start in the NBA against the New Orleans Pelicans. Two days later, House would record career-highs of 22 points and 8 rebounds in a 117–100 loss to the Golden State Warriors.
 Links: a. NBA G League b. Houston Rockets c. Golden State Warriors d. Northern Arizona Suns
Example Output: b

Example Input: Question: Who was wealthier when the Deepwater Railway was being built, Page or Rogers? Passage:Early in the 20th century, William Nelson Page, a civil engineer and coal mining manager, joined forces with a silent partner, industrialist financier Henry Huttleston Rogers (a principal of Standard Oil and one of the wealthiest men in the world), to develop the Deepwater Railway, a modest 85-mile long short line railroad to access untapped bituminous coal reserves in some of the most rugged sections of southern West Virginia. When Page was blocked by collusion of the bigger railroads, who refused to grant reasonable rates to interchange the coal traffic, he did not quit. As he continued building the original project, to provide their own link, using Rogers' resources and attorneys they quietly incorporated another intrastate railroad in Virginia, the Tidewater Railway. In this name, they secured the right-of-way needed all the way across Virginia to reach Hampton Roads, where a new coal pier was erected at Sewell's Point.
 Links: a. William Nelson Page b. Hampton Roads c. William Nelson Page d. William Nelson Page
Example Output:
a