Ultrasound is a form of sound wave that a healthy human ear cannot hear. Which range of frequencies includes only ultrasound?
- A$30\,\text{Hz}-3.0\,\text{kHz}$
- B$300\,\text{Hz}-30\,\text{kHz}$
- C$3.0\,\text{kHz}-3.0\,\text{MHz}$
- D$30\,\text{kHz}-30\,\text{MHz}$