The H _$\delta$ Line Has a Wavelength of 410 $\delta$ Line Appears in a Stars Spectrum at 410

Multiple Choice

The H _$\delta$ line has a wavelength of 410.2 nm when observed in the laboratory. If the H _$\delta$ line appears in a stars spectrum at 410.0 nm, what is the radial velocity of the star?

A) 146 km/s away from the observer
B) 146 km/s toward the observer
C) 6.0*10⁷ m/s away from the observer
D) 6.0*10⁷ m/s toward the observer
E) The radial velocity of the star cannot be determined from this information.