Question: What character did Sarah Chalke play on the most watched television show in the United States from 1989 to 1990?

Related documents: [0]  [DOC] Roseanne is an American sitcom that was broadcast on ABC from October 18, 1988, to May 20, 1997. Lauded for its realistic portrayal of the average American family, the series stars Roseanne Barr, and revolves around the Conners, an Illinois working-class family. The series reached #1 in the Nielsen ratings, becoming the most watched television show in the United States from 1989 to 1990. The show remained in the top four for six of its nine seasons, and in the top twenty for eight seasons. [END] 
[1]  [DOC] Sarah Chalke ( ; born August 27, 1976) is a Canadian actress. She is known for portraying Dr. Elliot Reid on the NBC/ABC comedy series "Scrubs", the second Rebecca "Becky" Conner on the ABC sitcom "Roseanne", Stella Zinman on the CBS sitcom "How I Met Your Mother", and Beth Smith on Adult Swim's adult animated science-fiction series "Rick and Morty". She also had a recurring role on the third season of the ABC/TBS sitcom "Cougar Town". [END]  
Answer: the second Rebecca "Becky" Conner
the second Rebecca "Becky" Conner