All personnel decisions must be made solely on the basis of select one: a. subjective preferences. b. race and color. c. objective criteria. d. sexual preferences. e. national origin.

All personnel decisions must be made on C. objective criteria.

Explanation:

Within any company or organization, all decisions regarding the personnel should be made under objective criteria so as to give every employee a fair stand.

Let's see why the other options are unjust:

Subjective preferences: this means someone might be getting favored or unfavored in account of what the individual carrying out the decision, thus this is not a fair option. Sexual preferences: again, the person might get favored or unfavored based on a sexual preference which is unfair once again. National origin: it should not be taken into account when carrying out decisions for the personnel.