Answer:
the group not receiving the benefits package
Step-by-step explanation:
A control group in a scientific experiment is a distinct group from the rest of those involved in experiment and where the testing of the independent variable can not influence the results of the experiment. It separates the results on the experiment from the independent variable and may help to find out alternative explanations of the experimental results. As per the question, employees who have not offered a benefits package would not influence the experiment and therefore should be called controlled groups.