The textbook describes a study in which Chicago high school students were divided into a group offered a part-time job and a group offered no job. The group offered no job is called the group.

The redundant group

Explanation:

In an experiment you test things. This things we test are called samples and most times when we have two samples as in this case-one usually serves as the major sample and the other serves as a feedback or measure. So the first is measured relative to the second. Here in this case group without jobs show no activity that are called redundant.

the first question's answer is a.

because he is that the right