The Hγ Line Has a Wavelength of 434 $1.3 × 10^8$

Multiple Choice

The Hγ line has a wavelength of 434.0 nm when observed in the laboratory. If the Hγ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star

A) 346 km/s away from the observer
B) 346 km/s toward the observer
C) $1.3 × 10^8$ m/s away from the observer
D) $1.3 × 10^8$ m/s toward the observer
E) The radial velocity of the star cannot be determined from this information.