Согласно тексту, "By the time he was in his early twenties, Shakespeare had moved to London, where he became a member of a theatre company called the Lord Chamberlain's Men, and was not only an actor but also a playwright". Это означает, что молодой Шекспир получил работу в театре в Лондоне.
Ответ: 2) in the theatre in London. (в театре в Лондоне)