Definition: 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.
Input: Question: When was the first NASCAR All-Star Race organized? Passage:Its first broadcast was the 1970 Daytona 500. The network broadcasts coverage of the NASCAR Cup Series and Xfinity Series races at tracks owned by ISC as well as Dover International Speedway and Pocono Raceway. It also has exclusive coverage of the entire Gander RV & Outdoors Truck Series schedule. Other NCS and NXS races are held at tracks owned by Speedway Motorsports, Inc. and the Indianapolis Motor Speedway. Both SMI and IMS have their own radio networks (Performance Racing Network and the IMS Radio Network), unrelated except for the appearance of Doug Rice on IndyCar Radio during coverage of the Brickyard 400. The NASCAR All-Star Open qualifying race and NASCAR All-Star Race are also broadcast on MRN, despite being held at Charlotte Motor Speedway, the headquarters of SMI. Many stations have affiliations with both MRN and PRN in order to air a full NASCAR schedule.
Links: a. Monster Energy NASCAR All-Star Race b. Brickyard 400 c. Dover International Speedway d. NASCAR Cup Series
Output:
a