The answer is D because you want to have a control group! Hope it helps!
Explanation:
Okie first question I'm not sure but I think it's the answer you have chosen.The second question is all of the above they all are used for weather.I think all of the above but not sure. Hope I helped!
Answer:
about or referring to the confluence of social and economic variables
Explanation:
Socioeconomic status is the social standing or class of an individual or group.
