Given a stock standard solution of concentration 0.200 m, calculate the volume in ml required to make up calibration standards of the following concentrations (in 25.0 ml volumetric flasks) 1.60 x 10-2 m

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.