The Spectral Luminosity Class of the Star Spica Is B1 $\tau$

Multiple Choice

The spectral luminosity class of the star Spica is B1 V, and that of the star $\tau$ Ceti is G8 V. From this information, one knows that Ceti is _____ Spica.

A) cooler but has the same luminosity as
B) cooler and has a lower luminosity than
C) hotter but has the same luminosity as
D) hotter and has a lower luminosity than