Fill in the blank (_) in the following sentence from the following choices.
Sentence: The stone we had was smoother than the other rock, so the _ skipped a farther distance on the pond.

Choice 1: The stone we had was smoother than the other rock, so the stone skipped a farther distance on the pond.
Choice 2: The stone we had was smoother than the other rock, so the rock skipped a farther distance on the pond.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.