A. 100 kHz
B. 1 GHz
C. 30 to 300 MHz
D. 3 to 30 MHz
✅ The correct answer is option D.
The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.
The HF band is based on frequencies 3 to 30 Mhz. AM radio stations are in the HF band but normally are stated in kilohertz.