Bertolt Brecht was a renowned playwright known for his contributions to epic theatre. The correct answer is 3 because the plays by Brecht listed in the options are:
A. The Caucasian Chalk Circle: This is indeed a play written by Bertolt Brecht. It’s one of his most famous works, known for its exploration of social justice and class issues.
B. Galileo: This is also a play by Brecht, formally titled Life of Galileo. It examines the conflict between science and religion, and Galileo’s role in this struggle.
E. Man Equals Man: This is another play by Brecht, exploring themes of identity and the effects of war on the human psyche.
The other options:
C. Copernicus: This is not a play by Brecht; it's a historical figure rather than a work by Brecht.
D. Archimedes: Similar to Copernicus, this refers to a historical figure and is not a work by Brecht.
So, options A, B, and E are all plays written by Bertolt Brecht, making the correct answer 3.