A certain radio wave has a wavelength of 8 × 10-2 m, and a certain gamma ray has a wavelength of 2 × 10-12 m. Which of the following is true? A.
The wavelength of the radio wave is forty billion times the wavelength of the gamma ray.

B.
The wavelength of the radio wave is four billion times the wavelength of the gamma ray.

C.
The wavelength of the gamma ray is forty billion times the wavelength of the radio wave.

D.
The wavelength of the gamma ray is four billion times the wavelength of the radio wave.