An aptitude test conducted on 10-year-old children gives the same scores when administered 2 months apart, but even the best students have scored less than 20%. This is a.            Reliable but not...

An aptitude test conducted on 10-year-old children gives the same scores when administered 2 months apart, but even the best students have scored less than 20%. This is

a.            Reliable but not valid

b.            Valid but not reliable

c.             Reliable but not authentic

d.            Neither valid nor reliable