A Television Signal Has a Wavelength of 10

A television signal has a wavelength of 10.0 km.What is its frequency in kilohertz?

A) 30.0 kHz
B) 3.00 × 10^{4 kHz}
C) 3.00 × 10^{7 kHz}
D) 3.33 × 10^{-7 kHz}
E) 3.33 × 10^{-2 kHz}