Fill in the blank (_) in the following sentence from the following choices.
Sentence: The red wine stain stood out on the white carpet because the _ was very dark.

Choice 1: The red wine stain stood out on the white carpet because the stain was very dark.
Choice 2: The red wine stain stood out on the white carpet because the carpet was very dark.
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
1
1.