If two stars are the same distance from us and they both appear to be the same

brightness, then they both

have the same apparent magnitude

have the same absolute magnitude

both a and b

It is a, apparent magnitude

The answer is A they have the same apparent magnitude

Explanation:

They can have different absolute magnitudes, with the brighter star being further away than the other. These can have the same apparent magnitude as seen from Earth, which also tells you that apparent magnitude depends on the location of the observer.