Given the task definition and input, reply with output. In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.

(CNN) Fifty years ago today, folk hero Bob Dylan caused an uproar when he took to the stage at Manchester's Free Trade Hall with -- wait for it -- an electric guitar. "Judas!" yelled someone in the crowd, referencing a traitor of biblical proportions. "I don't believe you," came Dylan's drawling, incredulous reply. For the British fans who had gathered to see their folk idol -- his 1963 album "The Freewheelin' Bob Dylan" had reached No. 1 in the UK -- this was the ultimate betrayal. RARE PHOTOS: Bob Dylan, in the beginning Audience members started slow hand-clapping. There were boos. People walked out.Dylan was booed by crowd and called "Judas" after singing with electric guitarOther controversial acts include Elvis Presley's "Hound Dog" hip moves in 1950s 
 Questions:If anyone knew the times were a-changin, it was _. (A) Bob Dylan (B) Manchester (C) Free Trade Hall (D) Judas! (E) British (F) Judas (G) Elvis Presley (H) Hound Dog

(A)