Two stars both have parallaxes of .023", but star A has apparent magnitude +2.3, while star B is magnitude +7.3. We can therefore conclude:

a. star A must be ten times closer.  

b. star B must be ten times more luminous.

c. nothing, since we do not know their absolute magnitudes.

d. star A is both 100X brighter and more luminous than star B.

e. star A is both 100X brighter and larger than star B.