Finish the following sentence with the best choice: How do you whistle?

Choices:
- Wet your lips and pucker slightly. With your mouth slightly open, place your tongue on the roof of your mouth, just behind your two front teeth. You should hear a high-pitched sound. The more you pucker and the harder you blow, the louder the tone.
- Wet your lips and pucker slightly. With your mouth slightly open, place your tongue on the roof of your mouth, just behind your two front teeth. You should hear a high-pitched sound. The more you pucker and the softer you blow, the louder the tone.

Answer:
Wet your lips and pucker slightly. With your mouth slightly open, place your tongue on the roof of your mouth, just behind your two front teeth. You should hear a high-pitched sound. The more you pucker and the harder you blow, the louder the tone.