Select the sentence with the correct comma placement: 

1. After we left the party we went home
2. After we left the party, we went home
3. After, we left the party we went home
4. After we left, the party we went home

 Introductory clauses (dependent clauses before main clauses) require commas. This follows Purdue OWL standards. The comma after “party” signals the end of the introductory phrase. Incorrect placements (options c/d) create awkward breaks, while omitted commas (option a) cause “garden-path” misreading.