Answer:
Stratified random sampling
Explanation:
Stratified random sampling is a design that involves dividing a group into smaller division or strata to get a defined result, this division is based on character or shared attitude. This design is also known as proportional random sampling.
might be because they're not originally from here and they're not white.
Answer: C)The idea that people pursuing their own self-interest actually benefit the public at large.
Explanation: Definition: The unobservable market force that helps the demand and supply of goods in a free market to reach equilibrium automatically is the invisible hand. Description: The phrase invisible hand was introduced by Adam Smith in his book 'The Wealth of Nations
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