In an experiment in which a new drug was being tested on 1000 rats, which one of the following would a computer be least able to do?

• determine the total amount of drug that had been given to all 1000 rats keep records of weight changes of the 1000 rats
• keep records of the dosages and the dates the drug was given to each rat
• determine the total dosage that had been given to each rat
• keep records of weight changes of the 1000 rates
• decide whether the drug was safe enough for use on humans