Fill in the blank (_) in the following sentence from the following choices.
Sentence: The barber used the strap to sharpen the razors but not the scissors, since the _ worked better after sharpening.

Choice 1: The barber used the strap to sharpen the razors but not the scissors, since the razors worked better after sharpening.
Choice 2: The barber used the strap to sharpen the razors but not the scissors, since the scissors worked better after sharpening.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.