D, disease. without clean water, they are subject to more germs and diseases leading to many deaths
Answer:
The things that do not belong to a person community or group but belong to a Nation is known as National Heritage.
Answer: There is no Pros V Cons to intervening with the war. If we get ourselves involved that would break international laws and Russia would get its allies to fight back, starting world war 3.
Explanation:
The correct answer is A.
<u>The dependent variable is:</u><u> how long students worked on the math problem.</u> Secondly, the goal of the study is to assess whether an explanatory variable (the confort of chairs) does have a causal effect on the lenght of math study or not.
As it is described in the question, the explanatory variable is a binary one: it takes value equal to 1 for the group seated in padded, comfortable chairs, and value 0 for the individuals in the group with standard chairs. Therefore, the study can be understood as the assesment on the validity of a treatment, on its capacity to make a difference on the dependent variable.
