Final answer:
A laugh track is a prerecorded clip of audience laughter that is played after a character in a sitcom makes a funny statement.
Step-by-step explanation:
According to the passage, a laugh track is b) A recorded audience laughter played after a funny statement. It is a common practice in the production of sitcoms to use a laugh track to cue the audience to the humorous parts of the show, suggesting that the presence of laughter can prompt viewers to find the content funnier. This concept goes hand in hand with the idea that laughter has a communal aspect, as people are more likely to laugh in the presence of others than when they are alone.