Which sentence avoids unnecessary past-perfect chaining while still making the order clear?
After I had measured the shelf, I had cut the board and had fitted the brackets.
The band had finished soundcheck, had packed the cables and had left the hall in that order.
Once the clerk had stamped the form, she had filed it and had called the applicant.
When Omar returned to the car, he noticed that someone had scratched the door.✓Respuesta correcta
Explicación
Omar's return is the later reference point, and one past-perfect verb correctly marks the earlier damage. The other sentences force several naturally ordered actions into past-perfect chains even though their linking words or sequence already make the chronology clear.