If Vega Is Apparent Magnitude Zero, and Deneb First Magnitude

Multiple Choice

If Vega is apparent magnitude zero, and Deneb first magnitude, then

A) Vega must be 2.5× hotter than Deneb.
B) Deneb must be a main sequence star, and Vega a giant.
C) Vega is about 100× brighter than Deneb.
D) Deneb is one magnitude brighter than Vega.
E) Vega is 2.5× brighter than Deneb.