Identify the portion that contains a compound subject

During the 1940s and 1950s, Budd Abbott and Lou Costello were a popular comedy team on radio, television, and stage.

During the 1940s and 1950s

The portion that contains a compound subject is "Budd Abbott and Lou Costello."

The portion that contains a compound subject in the given sentence is "Budd Abbott and Lou Costello". This is because it consists of two individuals, Budd Abbott and Lou Costello, who are being referred to as a comedy team.