Detailed Instructions: In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.
Problem:Question: Between Young's 1969 album and his 1970 album, which sold more copies? Passage:Members of this band had already released an album in 1968 as The Rockets, and had appeared on record twice with Neil Young as Crazy Horse. The core trio from the Rockets, Danny Whitten, Billy Talbot, and Ralph Molina, provided instrumental backing for Young's 1969 album Everybody Knows This Is Nowhere, and performed on some songs from Young's 1970 album After the Gold Rush. Producer/keyboardist Jack Nitzsche, who had been a member of Phil Spector's Wrecking Crew and played on records by The Rolling Stones, had worked with Young on his debut album and on tracks for Buffalo Springfield. He was drafted into Crazy Horse to back up Young on their short tour in early 1970. During sessions for Gold Rush, they met teenage guitar prodigy Nils Lofgren, who joined the band in time for this album, picking up a contract with Reprise Records after the exposure garnered from their association with Young.

Solution:
a