How to define control groups in an experiment Practice Test

There is no control group in this study.

One area of the city received no fresh fruit and vegetable stand.

The researchers gathered information on body weight of people living within 1 mile of this area's central location, both at the starting date and ending date of the study (1 year later).

There is a small town nearby which has several produce stands but also received another new fruit and vegetable stand.

The researchers gathered information on body weight of people living within 1 mile of this area's central location, both at the starting date and ending date of the study (1 year later).

Area A received a brand new fresh fruit and vegetable stand.

The researchers gathered information on body weight of people living within 1 mile of this area's central location, both at the starting date and ending date of the study (1 year later).

Area B received a new fresh fruit and vegetable stand.

The researchers gathered information on body weight of people living within 1 mile of this area's central location, both at the starting date and ending date of the study (1 year later).