The Star Zeta Pegasi (In the Constellation Pegasus, the Flying

The star Zeta Pegasi (in the constellation Pegasus, the Flying Horse) has a spectral luminosity class of B8 V, which gives it a surface temperature of about 11,000 K. According to Table 13-2 in the text, the expected main-sequence lifetime of Zeta Pegasi is

A) much greater than 500 million years.
B) about 500 million years.
C) not defined by this information.
D) about 500,000 years.