A Proton Is Roughly 1800 Times More Massive Than an Electron

Multiple Choice

A proton is roughly 1800 times more massive than an electron. If a proton and an electron are traveling at the same speed,

A) the wavelength of the proton will be about 1800 times longer than the wavelength of the electron.
B) the wavelength of the proton will be about $\sqrt{1800}$ times longer than the wavelength of the electron.
C) the wavelength of the proton will be roughly equal to the wavelength of the electron.
D) the wavelength of the electron will be about $\sqrt{1800}$ times longer than the wavelength of the proton.
E) the wavelength of the electron will be about 1800 times longer than the wavelength of the proton.