When the Electron in a Hydrogen Atom Falls from the N

When the electron in a hydrogen atom falls from the n = 3 excited energy level to the ground state energy level, a photon with wavelength $\lambda$ is emitted. An electron having this same wavelength would have a velocity of

A) 7.10 * 10³ m/s
B) 2.93 * 10⁶ m/s
C) 2.93 * 10³ m/s
D) 7.10 m/s
E) 3.00 * 10⁸ m/s