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: Which of Tasker's commentary colleagues at CBS is older? Passage:Tasker was a color commentator for CBS football telecasts (with Andrew Catalon (play-by-play) and Steve Beuerlein (the other color commentator) starting in 2014). CBS did not renew his contract at the end of the 2018 season. He also does color commentary for the local broadcasts of Bills pre-season games, teaming with either his former broadcast partner Andrew Catalon or Rob Stone. He is also the spokesperson for the West Herr Auto Group. Tasker was on the sidelines with Jim Nantz and Phil Simms during the playoffs until 2013. He also worked with Don Criqui (Criqui, himself a Buffalo native, and Tasker were assigned to the majority of Bills games from 1999 to 2005) and was best known working with Gus Johnson in 1998, week 13 in 1999, week 5 in 2004, and from 2005 to 2010. Johnson left for FOX Sports the following year. He and Johnson called the David Garrard game winning Hail Mary touchdown pass for the Jacksonville Jaguars' win over the Houston Texans in 2010. CBS dismissed Tasker prior to the 2019 season as they chose not to renew his contract.
Links: a. CBS Sports b. Jacksonville Jaguars c. Rob Stone (sportscaster) d. Gus Johnson (sportscaster)
Output:
a