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.

Ex Input:
Question: On what date did Recitation win its maiden race at Newbury Racecourse? Passage:After finishing third over five furlongs on his racecourse debut, Recitation won a maiden race over the same distance at Newbury Racecourse, beating I'll See You by half a length. The colt was then moved up sharply in class for the Group Three Coventry Stakes over six furlongs at Royal Ascot in June in which he was ridden by Greville Starkey and started at odds of 11/1. In a performance which Timeform described as "a revelation", Recitation took the lead a quarter mile from the finish and drew clear of the field to win easily by five lengths from Motavato, Bel Bolide and Another Realm. The form of the race was subsequently boosted when the third and fourth placed horses won the Gimcrack Stakes and the Richmond Stakes respectively. In the July Stakes at Newmarket Racecourse Recitation started 2/5 favourite against two opponents, but was beaten two and a half lengths by Age Quod Agis.
Links: a. Greville Starkey b. Newbury Racecourse c. Bel Bolide d. Maiden race

Ex Output:
d

Ex Input:
Question: Which county that I-24 goes through has the highest population? Passage:I-24 continues southeast through the rapidly growing suburbs of Nashville, and crosses into Rutherford County near the city of LaVergne, where there are three exits. Beginning at this point, I-24 is relatively straight and flat for most of its distance through Middle Tennessee. The straightest stretch of highway in Tennessee is located on I-24 between Lavergne and eastern Murfreesboro, where the route is perfectly straight for about fifteen miles, although the median widens and narrows. Four miles later is an interchange with SR 102, which connects to Smyrna and the Nissan Motor Manufacturing Plant. Another four miles later is an interchange with Interstate 840, the outer southern beltway around Nashville, and I-24 enters Murfreesboro, the largest suburb of Nashville. In Murfreesboro, I-24 has interchanges with SR 96 (which connects of Franklin), SR 99 (New Salem Highway), and US 231 (which connects to Lebanon and Shelbyville), respectively, and at the final Murfreesboro exit (US 231), the HOV lane designation ends, and I-24 narrows to six lanes and then four lanes a short distance later. Three miles later is an interchange with the Joe B. Jackson Parkway, which serves as an outer beltway around southeast Murfreesboro. I-24 then enters a more rural area, and at exit 97 has an interchange with SR 64, which connects to Shelbyville. I-24 then curves to the south, then the east, briefly enters Bedford County, and then Coffee County. At exit 105 is an interchange with US 41, and five miles later I-24 enters Manchester, where it has interchanges with SR 53, SR 55, and US 41, respectively. I-24 continues through a rural, largely agricultural area where it crosses into Grundy County and has an interchange with US 64 and SR 50.
Links: a. Rutherford County, Tennessee b. Tennessee State Route 53 c. Nissan d. Lebanon, Tennessee

Ex Output:
a

Ex Input:
Question: Who is the current president of the car manufacturer Radisich raced for in 1998? Passage:He won the 1993 and 1994 Touring Car World Cup events at Monza and at Donington respectively. 1993 was his first British Touring Car Championship (BTCC) season, in a Ford Mondeo prepared by Andy Rouse. He finished 3rd in the series despite only competing in half the year. He would again drive for Andy Rouse in 1994 where he finished 3rd again behind Gabriele Tarquini for Alfa Romeo and Alain Menu for Renault. Radisich would again drive for Andy Rouse in 1995 but by the end of the 1995 season the car had reached the end of its development cycle and was increasingly uncompetitive during the end of the 1995 season and in the 1996 season when West Surrey Racing took over the Ford team from Andy Rouse. 1996 would be a disappointment for the Ford team with no podium places and Radisich finishing 13th in the championship. 1997 would see a new Mondeo however it to was uncompetitive and would not challenge the front running teams. In 1998 he raced for Peugeot where he again had a disappointing season. He left the series and went to race for Dick Johnson Racing in the V8 Supercar series in Australia.
Links: a. DJR Team Penske b. Peugeot c. Alain Menu d. Gabriele Tarquini

Ex Output:
b