In an Analysis Relating Bohr's Theory to the De Broglie

Multiple Choice

In an analysis relating Bohr's theory to the de Broglie wavelength of electrons,when an electron moves from the n = 1 level to the n = 2 level,the circumference for its orbit becomes 4 times greater.This occurs because

A) there are four times as many wavelengths in the new orbit.
B) the wavelength of the electron becomes four times as long.
C) there are twice as many wavelengths,and each wavelength is twice as long.
D) the electron is moving four times as fast.