The atomic number of an element gives the number of __ and __in the atom while the mass number gives the total number of__and__

The atomic number of an element gives the proton and electron in the atom while the mass number gives the total number of protons and neutron

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.