Which One of the Following Statements Is the Assumption That

Multiple Choice

Which one of the following statements is the assumption that Niels Bohr made about the angular momentum of the electron in the hydrogen atom?

A) The angular momentum of the electron is zero.
B) The angular momentum can have only certain discrete values.
C) Angular momentum is not quantized.
D) The angular momentum can have any value greater than zero because it's proportional to the radius of the orbit.
E) The angular momentum is independent of the mass of the electron.