The answer is letter B. <span>Mexico and the United States.
Since Mexico and United States are geographically close to each other, the policy will affect them relatively more.
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The threat to validity that is likely to occur in the scenario above is Selection Bias.
<h3>What is Selection Bias?</h3>
This occurs when a researcher has control and intentionally chooses those who are going to be researched, observed, or studied. To eliminate this bias, the scientist must ensure that the sample population is selected very randomly.
Other threats to validity are:
- History
- Maturation
- Attrition
- Social Interaction
- Instrumentation
- Testing
- Regression to the mean, etc.
Please see the link below for more about Threat to Validity:
brainly.com/question/4168290
Answer:
Democracy
Explanation:
In a Representative Democracy, the people choose people to represent them in government, in a direct democracy, the people vote on EVERYTHING
Russia educates its people but has not been investing in capital goods and or technology their industry is not as productive as it could be
